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Finding the Fourth Proportional to 12,995.40, 17,930.52 and 7,691.52

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Solution

The fourth proportional to 12,995.40, 17,930.52 and 7,691.52 is: 10,612.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,995.40 : 17,930.52 = 7,691.52 : x
  2. Step 2: Convert to fraction form
    12,995.40/17,930.52 = 7,691.52/x
  3. Step 3: Cross multiply
    12,995.40x = 17,930.52 × 7,691.52
  4. Step 4: Simplify right side
    12,995.40x = 137,912,953.19
  5. Step 5: Solve for x
    x = 137,912,953.19/12,995.40
  6. Step 6: Final answer
    x = 10,612.44

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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.