Home / 10,515.15-15,738.39-7,740.69

Finding the Fourth Proportional to 10,515.15, 15,738.39 and 7,740.69

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Solution

The fourth proportional to 10,515.15, 15,738.39 and 7,740.69 is: 11,585.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,515.15 : 15,738.39 = 7,740.69 : x
  2. Step 2: Convert to fraction form
    10,515.15/15,738.39 = 7,740.69/x
  3. Step 3: Cross multiply
    10,515.15x = 15,738.39 × 7,740.69
  4. Step 4: Simplify right side
    10,515.15x = 121,825,998.09
  5. Step 5: Solve for x
    x = 121,825,998.09/10,515.15
  6. Step 6: Final answer
    x = 11,585.76

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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.