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Finding the Third Proportional to 15,528 and 21,434

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Solution

The third proportional to 15,528 and 21,434 is: 29,586.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,528 : 21,434 = 21,434 : x
  2. Step 2: Convert to fraction form
    15,528/21,434 = 21,434/x
  3. Step 3: Cross multiply
    15,528x = 21,434 × 21,434
  4. Step 4: Simplify right side
    15,528x = 459,416,356
  5. Step 5: Solve for x
    x = 459,416,356/15,528
  6. Step 6: Final answer
    x = 29,586.32

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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.