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Finding the Fourth Proportional to 47,987.96, 71,987.22 and 18,431.16

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Solution

The fourth proportional to 47,987.96, 71,987.22 and 18,431.16 is: 27,648.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,987.96 : 71,987.22 = 18,431.16 : x
  2. Step 2: Convert to fraction form
    47,987.96/71,987.22 = 18,431.16/x
  3. Step 3: Cross multiply
    47,987.96x = 71,987.22 × 18,431.16
  4. Step 4: Simplify right side
    47,987.96x = 1,326,807,969.78
  5. Step 5: Solve for x
    x = 1,326,807,969.78/47,987.96
  6. Step 6: Final answer
    x = 27,648.77

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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.