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Finding the Fourth Proportional to 9,190.65, 12,687.80 and 5,655.91

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Solution

The fourth proportional to 9,190.65, 12,687.80 and 5,655.91 is: 7,808.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,190.65 : 12,687.80 = 5,655.91 : x
  2. Step 2: Convert to fraction form
    9,190.65/12,687.80 = 5,655.91/x
  3. Step 3: Cross multiply
    9,190.65x = 12,687.80 × 5,655.91
  4. Step 4: Simplify right side
    9,190.65x = 71,761,054.90
  5. Step 5: Solve for x
    x = 71,761,054.90/9,190.65
  6. Step 6: Final answer
    x = 7,808.05

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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.