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Finding the Fourth Proportional to 12,425.95, 17,140.53 and 7,948.07

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Solution

The fourth proportional to 12,425.95, 17,140.53 and 7,948.07 is: 10,963.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,425.95 : 17,140.53 = 7,948.07 : x
  2. Step 2: Convert to fraction form
    12,425.95/17,140.53 = 7,948.07/x
  3. Step 3: Cross multiply
    12,425.95x = 17,140.53 × 7,948.07
  4. Step 4: Simplify right side
    12,425.95x = 136,234,132.28
  5. Step 5: Solve for x
    x = 136,234,132.28/12,425.95
  6. Step 6: Final answer
    x = 10,963.68

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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.