Home / 5,715.17-7,882.57-4,919.80

Finding the Fourth Proportional to 5,715.17, 7,882.57 and 4,919.80

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Solution

The fourth proportional to 5,715.17, 7,882.57 and 4,919.80 is: 6,785.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,715.17 : 7,882.57 = 4,919.80 : x
  2. Step 2: Convert to fraction form
    5,715.17/7,882.57 = 4,919.80/x
  3. Step 3: Cross multiply
    5,715.17x = 7,882.57 × 4,919.80
  4. Step 4: Simplify right side
    5,715.17x = 38,780,669.11
  5. Step 5: Solve for x
    x = 38,780,669.11/5,715.17
  6. Step 6: Final answer
    x = 6,785.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.