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Finding the Fourth Proportional to 21,490.52, 29,648.76 and 15,838.76

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Solution

The fourth proportional to 21,490.52, 29,648.76 and 15,838.76 is: 21,851.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,490.52 : 29,648.76 = 15,838.76 : x
  2. Step 2: Convert to fraction form
    21,490.52/29,648.76 = 15,838.76/x
  3. Step 3: Cross multiply
    21,490.52x = 29,648.76 × 15,838.76
  4. Step 4: Simplify right side
    21,490.52x = 469,599,593.94
  5. Step 5: Solve for x
    x = 469,599,593.94/21,490.52
  6. Step 6: Final answer
    x = 21,851.48

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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.