Home / 20,404.55-28,151.06-13,335.07

Finding the Fourth Proportional to 20,404.55, 28,151.06 and 13,335.07

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Solution

The fourth proportional to 20,404.55, 28,151.06 and 13,335.07 is: 18,397.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,404.55 : 28,151.06 = 13,335.07 : x
  2. Step 2: Convert to fraction form
    20,404.55/28,151.06 = 13,335.07/x
  3. Step 3: Cross multiply
    20,404.55x = 28,151.06 × 13,335.07
  4. Step 4: Simplify right side
    20,404.55x = 375,396,355.67
  5. Step 5: Solve for x
    x = 375,396,355.67/20,404.55
  6. Step 6: Final answer
    x = 18,397.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.