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Finding the Fourth Proportional to 21,008.16, 31,493.16 and 10,481.40

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Solution

The fourth proportional to 21,008.16, 31,493.16 and 10,481.40 is: 15,712.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.16 : 31,493.16 = 10,481.40 : x
  2. Step 2: Convert to fraction form
    21,008.16/31,493.16 = 10,481.40/x
  3. Step 3: Cross multiply
    21,008.16x = 31,493.16 × 10,481.40
  4. Step 4: Simplify right side
    21,008.16x = 330,092,387.48
  5. Step 5: Solve for x
    x = 330,092,387.48/21,008.16
  6. Step 6: Final answer
    x = 15,712.58

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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.