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Finding the Fourth Proportional to 8,861.72, 13,287.08 and 3,312.20

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Solution

The fourth proportional to 8,861.72, 13,287.08 and 3,312.20 is: 4,966.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,861.72 : 13,287.08 = 3,312.20 : x
  2. Step 2: Convert to fraction form
    8,861.72/13,287.08 = 3,312.20/x
  3. Step 3: Cross multiply
    8,861.72x = 13,287.08 × 3,312.20
  4. Step 4: Simplify right side
    8,861.72x = 44,009,466.38
  5. Step 5: Solve for x
    x = 44,009,466.38/8,861.72
  6. Step 6: Final answer
    x = 4,966.24

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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.