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Finding the Fourth Proportional to 18,691.52, 25,794.40 and 10,308

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Solution

The fourth proportional to 18,691.52, 25,794.40 and 10,308 is: 14,225.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,691.52 : 25,794.40 = 10,308 : x
  2. Step 2: Convert to fraction form
    18,691.52/25,794.40 = 10,308/x
  3. Step 3: Cross multiply
    18,691.52x = 25,794.40 × 10,308
  4. Step 4: Simplify right side
    18,691.52x = 265,888,675.20
  5. Step 5: Solve for x
    x = 265,888,675.20/18,691.52
  6. Step 6: Final answer
    x = 14,225.10

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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.