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Finding the Fourth Proportional to 19,470.78, 29,188.65 and 6,987.87

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Solution

The fourth proportional to 19,470.78, 29,188.65 and 6,987.87 is: 10,475.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,470.78 : 29,188.65 = 6,987.87 : x
  2. Step 2: Convert to fraction form
    19,470.78/29,188.65 = 6,987.87/x
  3. Step 3: Cross multiply
    19,470.78x = 29,188.65 × 6,987.87
  4. Step 4: Simplify right side
    19,470.78x = 203,966,491.68
  5. Step 5: Solve for x
    x = 203,966,491.68/19,470.78
  6. Step 6: Final answer
    x = 10,475.52

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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.