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Finding the Fourth Proportional to 9,110.65, 13,666.11 and 8,663.20

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Solution

The fourth proportional to 9,110.65, 13,666.11 and 8,663.20 is: 12,994.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,110.65 : 13,666.11 = 8,663.20 : x
  2. Step 2: Convert to fraction form
    9,110.65/13,666.11 = 8,663.20/x
  3. Step 3: Cross multiply
    9,110.65x = 13,666.11 × 8,663.20
  4. Step 4: Simplify right side
    9,110.65x = 118,392,244.15
  5. Step 5: Solve for x
    x = 118,392,244.15/9,110.65
  6. Step 6: Final answer
    x = 12,994.93

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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.