Home / 10,139.65-15,209.51-3,119.61

Finding the Fourth Proportional to 10,139.65, 15,209.51 and 3,119.61

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Solution

The fourth proportional to 10,139.65, 15,209.51 and 3,119.61 is: 4,679.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,139.65 : 15,209.51 = 3,119.61 : x
  2. Step 2: Convert to fraction form
    10,139.65/15,209.51 = 3,119.61/x
  3. Step 3: Cross multiply
    10,139.65x = 15,209.51 × 3,119.61
  4. Step 4: Simplify right side
    10,139.65x = 47,447,780.93
  5. Step 5: Solve for x
    x = 47,447,780.93/10,139.65
  6. Step 6: Final answer
    x = 4,679.43

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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.