Home / 12,488.40-18,732.69-4,691.70

Finding the Fourth Proportional to 12,488.40, 18,732.69 and 4,691.70

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Solution

The fourth proportional to 12,488.40, 18,732.69 and 4,691.70 is: 7,037.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,488.40 : 18,732.69 = 4,691.70 : x
  2. Step 2: Convert to fraction form
    12,488.40/18,732.69 = 4,691.70/x
  3. Step 3: Cross multiply
    12,488.40x = 18,732.69 × 4,691.70
  4. Step 4: Simplify right side
    12,488.40x = 87,888,161.67
  5. Step 5: Solve for x
    x = 87,888,161.67/12,488.40
  6. Step 6: Final answer
    x = 7,037.58

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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.