Home / 16,780.20-25,148.70-12,865.20

Finding the Fourth Proportional to 16,780.20, 25,148.70 and 12,865.20

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Solution

The fourth proportional to 16,780.20, 25,148.70 and 12,865.20 is: 19,281.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,780.20 : 25,148.70 = 12,865.20 : x
  2. Step 2: Convert to fraction form
    16,780.20/25,148.70 = 12,865.20/x
  3. Step 3: Cross multiply
    16,780.20x = 25,148.70 × 12,865.20
  4. Step 4: Simplify right side
    16,780.20x = 323,543,055.24
  5. Step 5: Solve for x
    x = 323,543,055.24/16,780.20
  6. Step 6: Final answer
    x = 19,281.24

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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.