Home / 15,380.64-21,224.16-8,665.92

Finding the Fourth Proportional to 15,380.64, 21,224.16 and 8,665.92

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Solution

The fourth proportional to 15,380.64, 21,224.16 and 8,665.92 is: 11,958.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,380.64 : 21,224.16 = 8,665.92 : x
  2. Step 2: Convert to fraction form
    15,380.64/21,224.16 = 8,665.92/x
  3. Step 3: Cross multiply
    15,380.64x = 21,224.16 × 8,665.92
  4. Step 4: Simplify right side
    15,380.64x = 183,926,872.63
  5. Step 5: Solve for x
    x = 183,926,872.63/15,380.64
  6. Step 6: Final answer
    x = 11,958.34

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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.