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Finding the Fourth Proportional to 19,988.96, 29,987.55 and 7,508.97

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Solution

The fourth proportional to 19,988.96, 29,987.55 and 7,508.97 is: 11,265.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,988.96 : 29,987.55 = 7,508.97 : x
  2. Step 2: Convert to fraction form
    19,988.96/29,987.55 = 7,508.97/x
  3. Step 3: Cross multiply
    19,988.96x = 29,987.55 × 7,508.97
  4. Step 4: Simplify right side
    19,988.96x = 225,175,613.32
  5. Step 5: Solve for x
    x = 225,175,613.32/19,988.96
  6. Step 6: Final answer
    x = 11,265.00

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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.