Home / 15,121.28-20,866.07-8,404.76

Finding the Fourth Proportional to 15,121.28, 20,866.07 and 8,404.76

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Solution

The fourth proportional to 15,121.28, 20,866.07 and 8,404.76 is: 11,597.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,121.28 : 20,866.07 = 8,404.76 : x
  2. Step 2: Convert to fraction form
    15,121.28/20,866.07 = 8,404.76/x
  3. Step 3: Cross multiply
    15,121.28x = 20,866.07 × 8,404.76
  4. Step 4: Simplify right side
    15,121.28x = 175,374,164.14
  5. Step 5: Solve for x
    x = 175,374,164.14/15,121.28
  6. Step 6: Final answer
    x = 11,597.84

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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.