Home / 10,515.07-15,770.98-3,120.18

Finding the Fourth Proportional to 10,515.07, 15,770.98 and 3,120.18

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Solution

The fourth proportional to 10,515.07, 15,770.98 and 3,120.18 is: 4,679.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,515.07 : 15,770.98 = 3,120.18 : x
  2. Step 2: Convert to fraction form
    10,515.07/15,770.98 = 3,120.18/x
  3. Step 3: Cross multiply
    10,515.07x = 15,770.98 × 3,120.18
  4. Step 4: Simplify right side
    10,515.07x = 49,208,296.38
  5. Step 5: Solve for x
    x = 49,208,296.38/10,515.07
  6. Step 6: Final answer
    x = 4,679.79

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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.