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Finding the Fourth Proportional to 45,318.62, 67,987.65 and 19,008.20

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Solution

The fourth proportional to 45,318.62, 67,987.65 and 19,008.20 is: 28,516.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,318.62 : 67,987.65 = 19,008.20 : x
  2. Step 2: Convert to fraction form
    45,318.62/67,987.65 = 19,008.20/x
  3. Step 3: Cross multiply
    45,318.62x = 67,987.65 × 19,008.20
  4. Step 4: Simplify right side
    45,318.62x = 1,292,322,508.79
  5. Step 5: Solve for x
    x = 1,292,322,508.79/45,318.62
  6. Step 6: Final answer
    x = 28,516.37

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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.