Home / 8,687.18-11,988.38-5,101.20

Finding the Fourth Proportional to 8,687.18, 11,988.38 and 5,101.20

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Solution

The fourth proportional to 8,687.18, 11,988.38 and 5,101.20 is: 7,039.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,687.18 : 11,988.38 = 5,101.20 : x
  2. Step 2: Convert to fraction form
    8,687.18/11,988.38 = 5,101.20/x
  3. Step 3: Cross multiply
    8,687.18x = 11,988.38 × 5,101.20
  4. Step 4: Simplify right side
    8,687.18x = 61,155,136.81
  5. Step 5: Solve for x
    x = 61,155,136.81/8,687.18
  6. Step 6: Final answer
    x = 7,039.70

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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.