Home / 8,685.10-11,990.55-5,706.13

Finding the Fourth Proportional to 8,685.10, 11,990.55 and 5,706.13

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Solution

The fourth proportional to 8,685.10, 11,990.55 and 5,706.13 is: 7,877.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,685.10 : 11,990.55 = 5,706.13 : x
  2. Step 2: Convert to fraction form
    8,685.10/11,990.55 = 5,706.13/x
  3. Step 3: Cross multiply
    8,685.10x = 11,990.55 × 5,706.13
  4. Step 4: Simplify right side
    8,685.10x = 68,419,637.07
  5. Step 5: Solve for x
    x = 68,419,637.07/8,685.10
  6. Step 6: Final answer
    x = 7,877.82

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Double scale
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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.