Home / 10,518.62-15,780.35-3,122.91

Finding the Fourth Proportional to 10,518.62, 15,780.35 and 3,122.91

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Solution

The fourth proportional to 10,518.62, 15,780.35 and 3,122.91 is: 4,685.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,518.62 : 15,780.35 = 3,122.91 : x
  2. Step 2: Convert to fraction form
    10,518.62/15,780.35 = 3,122.91/x
  3. Step 3: Cross multiply
    10,518.62x = 15,780.35 × 3,122.91
  4. Step 4: Simplify right side
    10,518.62x = 49,280,620.63
  5. Step 5: Solve for x
    x = 49,280,620.63/10,518.62
  6. Step 6: Final answer
    x = 4,685.09

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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.