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Finding the Fourth Proportional to 12,959.90, 17,881.62 and 7,655.52

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Solution

The fourth proportional to 12,959.90, 17,881.62 and 7,655.52 is: 10,562.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,959.90 : 17,881.62 = 7,655.52 : x
  2. Step 2: Convert to fraction form
    12,959.90/17,881.62 = 7,655.52/x
  3. Step 3: Cross multiply
    12,959.90x = 17,881.62 × 7,655.52
  4. Step 4: Simplify right side
    12,959.90x = 136,893,099.54
  5. Step 5: Solve for x
    x = 136,893,099.54/12,959.90
  6. Step 6: Final answer
    x = 10,562.82

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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.