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Finding the Fourth Proportional to 8,679.90, 13,007.70 and 6,079.80

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Solution

The fourth proportional to 8,679.90, 13,007.70 and 6,079.80 is: 9,111.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.90 : 13,007.70 = 6,079.80 : x
  2. Step 2: Convert to fraction form
    8,679.90/13,007.70 = 6,079.80/x
  3. Step 3: Cross multiply
    8,679.90x = 13,007.70 × 6,079.80
  4. Step 4: Simplify right side
    8,679.90x = 79,084,214.46
  5. Step 5: Solve for x
    x = 79,084,214.46/8,679.90
  6. Step 6: Final answer
    x = 9,111.19

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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.