Home / 31,986.60-47,979.90-28,098.60

Finding the Fourth Proportional to 31,986.60, 47,979.90 and 28,098.60

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Solution

The fourth proportional to 31,986.60, 47,979.90 and 28,098.60 is: 42,147.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,986.60 : 47,979.90 = 28,098.60 : x
  2. Step 2: Convert to fraction form
    31,986.60/47,979.90 = 28,098.60/x
  3. Step 3: Cross multiply
    31,986.60x = 47,979.90 × 28,098.60
  4. Step 4: Simplify right side
    31,986.60x = 1,348,168,018.14
  5. Step 5: Solve for x
    x = 1,348,168,018.14/31,986.60
  6. Step 6: Final answer
    x = 42,147.90

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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.