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Finding the Fourth Proportional to 18,159.76, 25,069.80 and 12,561.04

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Solution

The fourth proportional to 18,159.76, 25,069.80 and 12,561.04 is: 17,340.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,159.76 : 25,069.80 = 12,561.04 : x
  2. Step 2: Convert to fraction form
    18,159.76/25,069.80 = 12,561.04/x
  3. Step 3: Cross multiply
    18,159.76x = 25,069.80 × 12,561.04
  4. Step 4: Simplify right side
    18,159.76x = 314,902,760.59
  5. Step 5: Solve for x
    x = 314,902,760.59/18,159.76
  6. Step 6: Final answer
    x = 17,340.69

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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.