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Finding the Fourth Proportional to 18,614.64, 25,691.40 and 12,642.24

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Solution

The fourth proportional to 18,614.64, 25,691.40 and 12,642.24 is: 17,448.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,614.64 : 25,691.40 = 12,642.24 : x
  2. Step 2: Convert to fraction form
    18,614.64/25,691.40 = 12,642.24/x
  3. Step 3: Cross multiply
    18,614.64x = 25,691.40 × 12,642.24
  4. Step 4: Simplify right side
    18,614.64x = 324,796,844.74
  5. Step 5: Solve for x
    x = 324,796,844.74/18,614.64
  6. Step 6: Final answer
    x = 17,448.46

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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.