Home / 15,119.40-20,865.12-8,404.77

Finding the Fourth Proportional to 15,119.40, 20,865.12 and 8,404.77

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Solution

The fourth proportional to 15,119.40, 20,865.12 and 8,404.77 is: 11,598.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,119.40 : 20,865.12 = 8,404.77 : x
  2. Step 2: Convert to fraction form
    15,119.40/20,865.12 = 8,404.77/x
  3. Step 3: Cross multiply
    15,119.40x = 20,865.12 × 8,404.77
  4. Step 4: Simplify right side
    15,119.40x = 175,366,534.62
  5. Step 5: Solve for x
    x = 175,366,534.62/15,119.40
  6. Step 6: Final answer
    x = 11,598.78

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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.