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Finding the Fourth Proportional to 11,165.88, 15,407.16 and 6,449.25

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Solution

The fourth proportional to 11,165.88, 15,407.16 and 6,449.25 is: 8,898.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,165.88 : 15,407.16 = 6,449.25 : x
  2. Step 2: Convert to fraction form
    11,165.88/15,407.16 = 6,449.25/x
  3. Step 3: Cross multiply
    11,165.88x = 15,407.16 × 6,449.25
  4. Step 4: Simplify right side
    11,165.88x = 99,364,626.63
  5. Step 5: Solve for x
    x = 99,364,626.63/11,165.88
  6. Step 6: Final answer
    x = 8,898.95

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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.