Home / 15,331.32-21,156.72-8,616.78

Finding the Fourth Proportional to 15,331.32, 21,156.72 and 8,616.78

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Solution

The fourth proportional to 15,331.32, 21,156.72 and 8,616.78 is: 11,890.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,331.32 : 21,156.72 = 8,616.78 : x
  2. Step 2: Convert to fraction form
    15,331.32/21,156.72 = 8,616.78/x
  3. Step 3: Cross multiply
    15,331.32x = 21,156.72 × 8,616.78
  4. Step 4: Simplify right side
    15,331.32x = 182,302,801.76
  5. Step 5: Solve for x
    x = 182,302,801.76/15,331.32
  6. Step 6: Final answer
    x = 11,890.87

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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.