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Finding the Fourth Proportional to 12,691.71, 19,009.85 and 5,273.69

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Solution

The fourth proportional to 12,691.71, 19,009.85 and 5,273.69 is: 7,899.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,691.71 : 19,009.85 = 5,273.69 : x
  2. Step 2: Convert to fraction form
    12,691.71/19,009.85 = 5,273.69/x
  3. Step 3: Cross multiply
    12,691.71x = 19,009.85 × 5,273.69
  4. Step 4: Simplify right side
    12,691.71x = 100,251,934.43
  5. Step 5: Solve for x
    x = 100,251,934.43/12,691.71
  6. Step 6: Final answer
    x = 7,899.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.