Home / 30,000.20-45,000.30-28,041.80

Finding the Fourth Proportional to 30,000.20, 45,000.30 and 28,041.80

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Solution

The fourth proportional to 30,000.20, 45,000.30 and 28,041.80 is: 42,062.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,000.20 : 45,000.30 = 28,041.80 : x
  2. Step 2: Convert to fraction form
    30,000.20/45,000.30 = 28,041.80/x
  3. Step 3: Cross multiply
    30,000.20x = 45,000.30 × 28,041.80
  4. Step 4: Simplify right side
    30,000.20x = 1,261,889,412.54
  5. Step 5: Solve for x
    x = 1,261,889,412.54/30,000.20
  6. Step 6: Final answer
    x = 42,062.70

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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.