Home / 5,287.20-7,281.54-5,172.41

Finding the Fourth Proportional to 5,287.20, 7,281.54 and 5,172.41

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Solution

The fourth proportional to 5,287.20, 7,281.54 and 5,172.41 is: 7,123.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,287.20 : 7,281.54 = 5,172.41 : x
  2. Step 2: Convert to fraction form
    5,287.20/7,281.54 = 5,172.41/x
  3. Step 3: Cross multiply
    5,287.20x = 7,281.54 × 5,172.41
  4. Step 4: Simplify right side
    5,287.20x = 37,663,073.90
  5. Step 5: Solve for x
    x = 37,663,073.90/5,287.20
  6. Step 6: Final answer
    x = 7,123.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.