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Finding the Fourth Proportional to 12,957.40, 17,862.96 and 10,959.88

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Solution

The fourth proportional to 12,957.40, 17,862.96 and 10,959.88 is: 15,109.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,957.40 : 17,862.96 = 10,959.88 : x
  2. Step 2: Convert to fraction form
    12,957.40/17,862.96 = 10,959.88/x
  3. Step 3: Cross multiply
    12,957.40x = 17,862.96 × 10,959.88
  4. Step 4: Simplify right side
    12,957.40x = 195,775,898.04
  5. Step 5: Solve for x
    x = 195,775,898.04/12,957.40
  6. Step 6: Final answer
    x = 15,109.20

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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.