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Finding the Fourth Proportional to 21,671.65, 32,484.07 and 10,553.77

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Solution

The fourth proportional to 21,671.65, 32,484.07 and 10,553.77 is: 15,819.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,671.65 : 32,484.07 = 10,553.77 : x
  2. Step 2: Convert to fraction form
    21,671.65/32,484.07 = 10,553.77/x
  3. Step 3: Cross multiply
    21,671.65x = 32,484.07 × 10,553.77
  4. Step 4: Simplify right side
    21,671.65x = 342,829,403.44
  5. Step 5: Solve for x
    x = 342,829,403.44/21,671.65
  6. Step 6: Final answer
    x = 15,819.26

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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.