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Finding the Fourth Proportional to 28,210.74, 38,930.72 and 15,464

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Solution

The fourth proportional to 28,210.74, 38,930.72 and 15,464 is: 21,340.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,210.74 : 38,930.72 = 15,464 : x
  2. Step 2: Convert to fraction form
    28,210.74/38,930.72 = 15,464/x
  3. Step 3: Cross multiply
    28,210.74x = 38,930.72 × 15,464
  4. Step 4: Simplify right side
    28,210.74x = 602,024,654.08
  5. Step 5: Solve for x
    x = 602,024,654.08/28,210.74
  6. Step 6: Final answer
    x = 21,340.26

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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.