Home / 28,904.78-43,366.42-12,278.78

Finding the Fourth Proportional to 28,904.78, 43,366.42 and 12,278.78

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Solution

The fourth proportional to 28,904.78, 43,366.42 and 12,278.78 is: 18,422.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,904.78 : 43,366.42 = 12,278.78 : x
  2. Step 2: Convert to fraction form
    28,904.78/43,366.42 = 12,278.78/x
  3. Step 3: Cross multiply
    28,904.78x = 43,366.42 × 12,278.78
  4. Step 4: Simplify right side
    28,904.78x = 532,486,730.57
  5. Step 5: Solve for x
    x = 532,486,730.57/28,904.78
  6. Step 6: Final answer
    x = 18,422.10

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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.