Home / 20,402.22-28,155.36-11,449.20

Finding the Fourth Proportional to 20,402.22, 28,155.36 and 11,449.20

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Solution

The fourth proportional to 20,402.22, 28,155.36 and 11,449.20 is: 15,800.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,402.22 : 28,155.36 = 11,449.20 : x
  2. Step 2: Convert to fraction form
    20,402.22/28,155.36 = 11,449.20/x
  3. Step 3: Cross multiply
    20,402.22x = 28,155.36 × 11,449.20
  4. Step 4: Simplify right side
    20,402.22x = 322,356,347.71
  5. Step 5: Solve for x
    x = 322,356,347.71/20,402.22
  6. Step 6: Final answer
    x = 15,800.06

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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.