Home / 13,740.39-18,959.57-8,079.99

Finding the Fourth Proportional to 13,740.39, 18,959.57 and 8,079.99

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Solution

The fourth proportional to 13,740.39, 18,959.57 and 8,079.99 is: 11,149.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,740.39 : 18,959.57 = 8,079.99 : x
  2. Step 2: Convert to fraction form
    13,740.39/18,959.57 = 8,079.99/x
  3. Step 3: Cross multiply
    13,740.39x = 18,959.57 × 8,079.99
  4. Step 4: Simplify right side
    13,740.39x = 153,193,136.00
  5. Step 5: Solve for x
    x = 153,193,136.00/13,740.39
  6. Step 6: Final answer
    x = 11,149.11

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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.