Home / 15,128.60-22,665.90-7,320.20

Finding the Fourth Proportional to 15,128.60, 22,665.90 and 7,320.20

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Solution

The fourth proportional to 15,128.60, 22,665.90 and 7,320.20 is: 10,967.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.60 : 22,665.90 = 7,320.20 : x
  2. Step 2: Convert to fraction form
    15,128.60/22,665.90 = 7,320.20/x
  3. Step 3: Cross multiply
    15,128.60x = 22,665.90 × 7,320.20
  4. Step 4: Simplify right side
    15,128.60x = 165,918,921.18
  5. Step 5: Solve for x
    x = 165,918,921.18/15,128.60
  6. Step 6: Final answer
    x = 10,967.24

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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.