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Finding the Fourth Proportional to 28,065.39, 42,098.55 and 9,345.15

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Solution

The fourth proportional to 28,065.39, 42,098.55 and 9,345.15 is: 14,017.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,065.39 : 42,098.55 = 9,345.15 : x
  2. Step 2: Convert to fraction form
    28,065.39/42,098.55 = 9,345.15/x
  3. Step 3: Cross multiply
    28,065.39x = 42,098.55 × 9,345.15
  4. Step 4: Simplify right side
    28,065.39x = 393,417,264.53
  5. Step 5: Solve for x
    x = 393,417,264.53/28,065.39
  6. Step 6: Final answer
    x = 14,017.88

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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.