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Finding the Fourth Proportional to 9,395.80, 12,939.96 and 9,191.68

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Solution

The fourth proportional to 9,395.80, 12,939.96 and 9,191.68 is: 12,658.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,395.80 : 12,939.96 = 9,191.68 : x
  2. Step 2: Convert to fraction form
    9,395.80/12,939.96 = 9,191.68/x
  3. Step 3: Cross multiply
    9,395.80x = 12,939.96 × 9,191.68
  4. Step 4: Simplify right side
    9,395.80x = 118,939,971.53
  5. Step 5: Solve for x
    x = 118,939,971.53/9,395.80
  6. Step 6: Final answer
    x = 12,658.84

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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.