Home / 15,380.31-21,225.24-8,665.55

Finding the Fourth Proportional to 15,380.31, 21,225.24 and 8,665.55

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Solution

The fourth proportional to 15,380.31, 21,225.24 and 8,665.55 is: 11,958.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,380.31 : 21,225.24 = 8,665.55 : x
  2. Step 2: Convert to fraction form
    15,380.31/21,225.24 = 8,665.55/x
  3. Step 3: Cross multiply
    15,380.31x = 21,225.24 × 8,665.55
  4. Step 4: Simplify right side
    15,380.31x = 183,928,272.36
  5. Step 5: Solve for x
    x = 183,928,272.36/15,380.31
  6. Step 6: Final answer
    x = 11,958.68

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Double scale
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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.