Home / 10,519.49-15,780.87-3,124.68

Finding the Fourth Proportional to 10,519.49, 15,780.87 and 3,124.68

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Solution

The fourth proportional to 10,519.49, 15,780.87 and 3,124.68 is: 4,687.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,519.49 : 15,780.87 = 3,124.68 : x
  2. Step 2: Convert to fraction form
    10,519.49/15,780.87 = 3,124.68/x
  3. Step 3: Cross multiply
    10,519.49x = 15,780.87 × 3,124.68
  4. Step 4: Simplify right side
    10,519.49x = 49,310,168.87
  5. Step 5: Solve for x
    x = 49,310,168.87/10,519.49
  6. Step 6: Final answer
    x = 4,687.51

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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.