Home / 40,145.18-60,255.12-20,438.48

Finding the Fourth Proportional to 40,145.18, 60,255.12 and 20,438.48

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Solution

The fourth proportional to 40,145.18, 60,255.12 and 20,438.48 is: 30,676.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,145.18 : 60,255.12 = 20,438.48 : x
  2. Step 2: Convert to fraction form
    40,145.18/60,255.12 = 20,438.48/x
  3. Step 3: Cross multiply
    40,145.18x = 60,255.12 × 20,438.48
  4. Step 4: Simplify right side
    40,145.18x = 1,231,523,065.02
  5. Step 5: Solve for x
    x = 1,231,523,065.02/40,145.18
  6. Step 6: Final answer
    x = 30,676.74

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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.