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Finding the Fourth Proportional to 31,691.80, 47,544.90 and 18,537.40

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Solution

The fourth proportional to 31,691.80, 47,544.90 and 18,537.40 is: 27,810.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,691.80 : 47,544.90 = 18,537.40 : x
  2. Step 2: Convert to fraction form
    31,691.80/47,544.90 = 18,537.40/x
  3. Step 3: Cross multiply
    31,691.80x = 47,544.90 × 18,537.40
  4. Step 4: Simplify right side
    31,691.80x = 881,358,829.26
  5. Step 5: Solve for x
    x = 881,358,829.26/31,691.80
  6. Step 6: Final answer
    x = 27,810.31

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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.