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Finding the Fourth Proportional to 18,691.80, 25,794.69 and 10,308.30

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Solution

The fourth proportional to 18,691.80, 25,794.69 and 10,308.30 is: 14,225.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,691.80 : 25,794.69 = 10,308.30 : x
  2. Step 2: Convert to fraction form
    18,691.80/25,794.69 = 10,308.30/x
  3. Step 3: Cross multiply
    18,691.80x = 25,794.69 × 10,308.30
  4. Step 4: Simplify right side
    18,691.80x = 265,899,528.67
  5. Step 5: Solve for x
    x = 265,899,528.67/18,691.80
  6. Step 6: Final answer
    x = 14,225.46

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Similar ratio
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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.