Home / 20,428.17-28,202.69-13,366.90

Finding the Fourth Proportional to 20,428.17, 28,202.69 and 13,366.90

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Solution

The fourth proportional to 20,428.17, 28,202.69 and 13,366.90 is: 18,454.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428.17 : 28,202.69 = 13,366.90 : x
  2. Step 2: Convert to fraction form
    20,428.17/28,202.69 = 13,366.90/x
  3. Step 3: Cross multiply
    20,428.17x = 28,202.69 × 13,366.90
  4. Step 4: Simplify right side
    20,428.17x = 376,982,536.96
  5. Step 5: Solve for x
    x = 376,982,536.96/20,428.17
  6. Step 6: Final answer
    x = 18,454.05

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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.