Home / 45,819.64-68,729.41-12,540

Finding the Fourth Proportional to 45,819.64, 68,729.41 and 12,540

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Solution

The fourth proportional to 45,819.64, 68,729.41 and 12,540 is: 18,809.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,819.64 : 68,729.41 = 12,540 : x
  2. Step 2: Convert to fraction form
    45,819.64/68,729.41 = 12,540/x
  3. Step 3: Cross multiply
    45,819.64x = 68,729.41 × 12,540
  4. Step 4: Simplify right side
    45,819.64x = 861,866,801.40
  5. Step 5: Solve for x
    x = 861,866,801.40/45,819.64
  6. Step 6: Final answer
    x = 18,809.99

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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.