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Finding the Fourth Proportional to 8,885.72, 13,328.60 and 4,992.86

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Solution

The fourth proportional to 8,885.72, 13,328.60 and 4,992.86 is: 7,489.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,885.72 : 13,328.60 = 4,992.86 : x
  2. Step 2: Convert to fraction form
    8,885.72/13,328.60 = 4,992.86/x
  3. Step 3: Cross multiply
    8,885.72x = 13,328.60 × 4,992.86
  4. Step 4: Simplify right side
    8,885.72x = 66,547,842.15
  5. Step 5: Solve for x
    x = 66,547,842.15/8,885.72
  6. Step 6: Final answer
    x = 7,489.30

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.