Home / 3,715.76-5,126.81-2,391.21

Finding the Fourth Proportional to 3,715.76, 5,126.81 and 2,391.21

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Solution

The fourth proportional to 3,715.76, 5,126.81 and 2,391.21 is: 3,299.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,715.76 : 5,126.81 = 2,391.21 : x
  2. Step 2: Convert to fraction form
    3,715.76/5,126.81 = 2,391.21/x
  3. Step 3: Cross multiply
    3,715.76x = 5,126.81 × 2,391.21
  4. Step 4: Simplify right side
    3,715.76x = 12,259,253.71
  5. Step 5: Solve for x
    x = 12,259,253.71/3,715.76
  6. Step 6: Final answer
    x = 3,299.26

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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.