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Finding the Fourth Proportional to 15,591, 21,513.10 and 8,876.76

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Solution

The fourth proportional to 15,591, 21,513.10 and 8,876.76 is: 12,248.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,591 : 21,513.10 = 8,876.76 : x
  2. Step 2: Convert to fraction form
    15,591/21,513.10 = 8,876.76/x
  3. Step 3: Cross multiply
    15,591x = 21,513.10 × 8,876.76
  4. Step 4: Simplify right side
    15,591x = 190,966,625.56
  5. Step 5: Solve for x
    x = 190,966,625.56/15,591
  6. Step 6: Final answer
    x = 12,248.52

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Half scale
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Double scale
Find fourth proportional to 15,592, 21,514.48 and 8,877.76
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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.