Home / 10,515.07-15,770.18-3,117.75

Finding the Fourth Proportional to 10,515.07, 15,770.18 and 3,117.75

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Solution

The fourth proportional to 10,515.07, 15,770.18 and 3,117.75 is: 4,675.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,515.07 : 15,770.18 = 3,117.75 : x
  2. Step 2: Convert to fraction form
    10,515.07/15,770.18 = 3,117.75/x
  3. Step 3: Cross multiply
    10,515.07x = 15,770.18 × 3,117.75
  4. Step 4: Simplify right side
    10,515.07x = 49,167,478.70
  5. Step 5: Solve for x
    x = 49,167,478.70/10,515.07
  6. Step 6: Final answer
    x = 4,675.91

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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.