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Finding the Fourth Proportional to 19,011.74, 28,517.01 and 7,918.15

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Solution

The fourth proportional to 19,011.74, 28,517.01 and 7,918.15 is: 11,876.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,011.74 : 28,517.01 = 7,918.15 : x
  2. Step 2: Convert to fraction form
    19,011.74/28,517.01 = 7,918.15/x
  3. Step 3: Cross multiply
    19,011.74x = 28,517.01 × 7,918.15
  4. Step 4: Simplify right side
    19,011.74x = 225,801,962.73
  5. Step 5: Solve for x
    x = 225,801,962.73/19,011.74
  6. Step 6: Final answer
    x = 11,876.98

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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.