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Finding the Fourth Proportional to 12,691.80, 17,512.47 and 7,313.04

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Solution

The fourth proportional to 12,691.80, 17,512.47 and 7,313.04 is: 10,090.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,691.80 : 17,512.47 = 7,313.04 : x
  2. Step 2: Convert to fraction form
    12,691.80/17,512.47 = 7,313.04/x
  3. Step 3: Cross multiply
    12,691.80x = 17,512.47 × 7,313.04
  4. Step 4: Simplify right side
    12,691.80x = 128,069,393.61
  5. Step 5: Solve for x
    x = 128,069,393.61/12,691.80
  6. Step 6: Final answer
    x = 10,090.72

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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.