Home / 9,988.20-13,778.53-8,101.92

Finding the Fourth Proportional to 9,988.20, 13,778.53 and 8,101.92

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Solution

The fourth proportional to 9,988.20, 13,778.53 and 8,101.92 is: 11,176.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,988.20 : 13,778.53 = 8,101.92 : x
  2. Step 2: Convert to fraction form
    9,988.20/13,778.53 = 8,101.92/x
  3. Step 3: Cross multiply
    9,988.20x = 13,778.53 × 8,101.92
  4. Step 4: Simplify right side
    9,988.20x = 111,632,547.78
  5. Step 5: Solve for x
    x = 111,632,547.78/9,988.20
  6. Step 6: Final answer
    x = 11,176.44

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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.