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Finding the Fourth Proportional to 15,553.74, 21,464.30 and 8,480.30

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Solution

The fourth proportional to 15,553.74, 21,464.30 and 8,480.30 is: 11,702.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,553.74 : 21,464.30 = 8,480.30 : x
  2. Step 2: Convert to fraction form
    15,553.74/21,464.30 = 8,480.30/x
  3. Step 3: Cross multiply
    15,553.74x = 21,464.30 × 8,480.30
  4. Step 4: Simplify right side
    15,553.74x = 182,023,703.29
  5. Step 5: Solve for x
    x = 182,023,703.29/15,553.74
  6. Step 6: Final answer
    x = 11,702.89

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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.