Home / 12,780.28-19,170.42-5,854.78

Finding the Fourth Proportional to 12,780.28, 19,170.42 and 5,854.78

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Solution

The fourth proportional to 12,780.28, 19,170.42 and 5,854.78 is: 8,782.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,780.28 : 19,170.42 = 5,854.78 : x
  2. Step 2: Convert to fraction form
    12,780.28/19,170.42 = 5,854.78/x
  3. Step 3: Cross multiply
    12,780.28x = 19,170.42 × 5,854.78
  4. Step 4: Simplify right side
    12,780.28x = 112,238,626.55
  5. Step 5: Solve for x
    x = 112,238,626.55/12,780.28
  6. Step 6: Final answer
    x = 8,782.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.