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Finding the Fourth Proportional to 8,885.44, 12,259.20 and 5,158.72

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Solution

The fourth proportional to 8,885.44, 12,259.20 and 5,158.72 is: 7,117.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,885.44 : 12,259.20 = 5,158.72 : x
  2. Step 2: Convert to fraction form
    8,885.44/12,259.20 = 5,158.72/x
  3. Step 3: Cross multiply
    8,885.44x = 12,259.20 × 5,158.72
  4. Step 4: Simplify right side
    8,885.44x = 63,241,780.22
  5. Step 5: Solve for x
    x = 63,241,780.22/8,885.44
  6. Step 6: Final answer
    x = 7,117.46

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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.