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Finding the Fourth Proportional to 21,621.52, 29,841 and 15,651

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Solution

The fourth proportional to 21,621.52, 29,841 and 15,651 is: 21,600.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,621.52 : 29,841 = 15,651 : x
  2. Step 2: Convert to fraction form
    21,621.52/29,841 = 15,651/x
  3. Step 3: Cross multiply
    21,621.52x = 29,841 × 15,651
  4. Step 4: Simplify right side
    21,621.52x = 467,041,491
  5. Step 5: Solve for x
    x = 467,041,491/21,621.52
  6. Step 6: Final answer
    x = 21,600.77

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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.