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Finding the Fourth Proportional to 12,891.47, 19,425.02 and 10,602.74

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Solution

The fourth proportional to 12,891.47, 19,425.02 and 10,602.74 is: 15,976.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,891.47 : 19,425.02 = 10,602.74 : x
  2. Step 2: Convert to fraction form
    12,891.47/19,425.02 = 10,602.74/x
  3. Step 3: Cross multiply
    12,891.47x = 19,425.02 × 10,602.74
  4. Step 4: Simplify right side
    12,891.47x = 205,958,432.10
  5. Step 5: Solve for x
    x = 205,958,432.10/12,891.47
  6. Step 6: Final answer
    x = 15,976.34

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.