Home / 10,346.20-15,519.30-7,721.80

Finding the Fourth Proportional to 10,346.20, 15,519.30 and 7,721.80

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Solution

The fourth proportional to 10,346.20, 15,519.30 and 7,721.80 is: 11,582.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,346.20 : 15,519.30 = 7,721.80 : x
  2. Step 2: Convert to fraction form
    10,346.20/15,519.30 = 7,721.80/x
  3. Step 3: Cross multiply
    10,346.20x = 15,519.30 × 7,721.80
  4. Step 4: Simplify right side
    10,346.20x = 119,836,930.74
  5. Step 5: Solve for x
    x = 119,836,930.74/10,346.20
  6. Step 6: Final answer
    x = 11,582.70

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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.