Home / 15,326.78-21,151.58-8,612.38

Finding the Fourth Proportional to 15,326.78, 21,151.58 and 8,612.38

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Solution

The fourth proportional to 15,326.78, 21,151.58 and 8,612.38 is: 11,885.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,326.78 : 21,151.58 = 8,612.38 : x
  2. Step 2: Convert to fraction form
    15,326.78/21,151.58 = 8,612.38/x
  3. Step 3: Cross multiply
    15,326.78x = 21,151.58 × 8,612.38
  4. Step 4: Simplify right side
    15,326.78x = 182,165,427.94
  5. Step 5: Solve for x
    x = 182,165,427.94/15,326.78
  6. Step 6: Final answer
    x = 11,885.44

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Half scale
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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.