Home / 6,515.40-9,750.70-3,920.20

Finding the Fourth Proportional to 6,515.40, 9,750.70 and 3,920.20

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Solution

The fourth proportional to 6,515.40, 9,750.70 and 3,920.20 is: 5,866.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,515.40 : 9,750.70 = 3,920.20 : x
  2. Step 2: Convert to fraction form
    6,515.40/9,750.70 = 3,920.20/x
  3. Step 3: Cross multiply
    6,515.40x = 9,750.70 × 3,920.20
  4. Step 4: Simplify right side
    6,515.40x = 38,224,694.14
  5. Step 5: Solve for x
    x = 38,224,694.14/6,515.40
  6. Step 6: Final answer
    x = 5,866.82

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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.