Home / 15,691.48-21,654.54-8,618.32

Finding the Fourth Proportional to 15,691.48, 21,654.54 and 8,618.32

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Solution

The fourth proportional to 15,691.48, 21,654.54 and 8,618.32 is: 11,893.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,691.48 : 21,654.54 = 8,618.32 : x
  2. Step 2: Convert to fraction form
    15,691.48/21,654.54 = 8,618.32/x
  3. Step 3: Cross multiply
    15,691.48x = 21,654.54 × 8,618.32
  4. Step 4: Simplify right side
    15,691.48x = 186,625,755.17
  5. Step 5: Solve for x
    x = 186,625,755.17/15,691.48
  6. Step 6: Final answer
    x = 11,893.45

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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.