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Finding the Fourth Proportional to 15,280.32, 21,086.24 and 8,656.32

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Solution

The fourth proportional to 15,280.32, 21,086.24 and 8,656.32 is: 11,945.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,280.32 : 21,086.24 = 8,656.32 : x
  2. Step 2: Convert to fraction form
    15,280.32/21,086.24 = 8,656.32/x
  3. Step 3: Cross multiply
    15,280.32x = 21,086.24 × 8,656.32
  4. Step 4: Simplify right side
    15,280.32x = 182,529,241.04
  5. Step 5: Solve for x
    x = 182,529,241.04/15,280.32
  6. Step 6: Final answer
    x = 11,945.38

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Double scale
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Similar ratio
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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.