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Finding the Fourth Proportional to 9,079.60, 13,633.80 and 6,890.80

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Solution

The fourth proportional to 9,079.60, 13,633.80 and 6,890.80 is: 10,347.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,079.60 : 13,633.80 = 6,890.80 : x
  2. Step 2: Convert to fraction form
    9,079.60/13,633.80 = 6,890.80/x
  3. Step 3: Cross multiply
    9,079.60x = 13,633.80 × 6,890.80
  4. Step 4: Simplify right side
    9,079.60x = 93,947,789.04
  5. Step 5: Solve for x
    x = 93,947,789.04/9,079.60
  6. Step 6: Final answer
    x = 10,347.13

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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.