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Finding the Fourth Proportional to 21,616.84, 29,842.51 and 15,344.20

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Solution

The fourth proportional to 21,616.84, 29,842.51 and 15,344.20 is: 21,182.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,616.84 : 29,842.51 = 15,344.20 : x
  2. Step 2: Convert to fraction form
    21,616.84/29,842.51 = 15,344.20/x
  3. Step 3: Cross multiply
    21,616.84x = 29,842.51 × 15,344.20
  4. Step 4: Simplify right side
    21,616.84x = 457,909,292.73
  5. Step 5: Solve for x
    x = 457,909,292.73/21,616.84
  6. Step 6: Final answer
    x = 21,182.99

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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.