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Finding the Fourth Proportional to 15,801.60, 21,810.04 and 9,512.76

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Solution

The fourth proportional to 15,801.60, 21,810.04 and 9,512.76 is: 13,129.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,801.60 : 21,810.04 = 9,512.76 : x
  2. Step 2: Convert to fraction form
    15,801.60/21,810.04 = 9,512.76/x
  3. Step 3: Cross multiply
    15,801.60x = 21,810.04 × 9,512.76
  4. Step 4: Simplify right side
    15,801.60x = 207,473,676.11
  5. Step 5: Solve for x
    x = 207,473,676.11/15,801.60
  6. Step 6: Final answer
    x = 13,129.92

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Half scale
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Double scale
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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.