Home / 60,420.30-90,630.45-20,981.40

Finding the Fourth Proportional to 60,420.30, 90,630.45 and 20,981.40

Calculator

Solution

The fourth proportional to 60,420.30, 90,630.45 and 20,981.40 is: 31,472.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,420.30 : 90,630.45 = 20,981.40 : x
  2. Step 2: Convert to fraction form
    60,420.30/90,630.45 = 20,981.40/x
  3. Step 3: Cross multiply
    60,420.30x = 90,630.45 × 20,981.40
  4. Step 4: Simplify right side
    60,420.30x = 1,901,553,723.63
  5. Step 5: Solve for x
    x = 1,901,553,723.63/60,420.30
  6. Step 6: Final answer
    x = 31,472.10

Related Problems

Find fourth proportional to 30,210.15, 45,315.23 and 10,490.70
Half scale
Find fourth proportional to 120,840.60, 181,260.90 and 41,962.80
Double scale
Find fourth proportional to 60,421.30, 90,631.95 and 20,982.40
Similar ratio
Find fourth proportional to 90,630.45, 135,945.68 and 31,472.10
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.