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Finding the Fourth Proportional to 5,287.90, 7,931.85 and 2,167.32

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Solution

The fourth proportional to 5,287.90, 7,931.85 and 2,167.32 is: 3,250.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,287.90 : 7,931.85 = 2,167.32 : x
  2. Step 2: Convert to fraction form
    5,287.90/7,931.85 = 2,167.32/x
  3. Step 3: Cross multiply
    5,287.90x = 7,931.85 × 2,167.32
  4. Step 4: Simplify right side
    5,287.90x = 17,190,857.14
  5. Step 5: Solve for x
    x = 17,190,857.14/5,287.90
  6. Step 6: Final answer
    x = 3,250.98

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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.