Home / 3,126.40-4,685.95-1,391.38

Finding the Fourth Proportional to 3,126.40, 4,685.95 and 1,391.38

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Solution

The fourth proportional to 3,126.40, 4,685.95 and 1,391.38 is: 2,085.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.40 : 4,685.95 = 1,391.38 : x
  2. Step 2: Convert to fraction form
    3,126.40/4,685.95 = 1,391.38/x
  3. Step 3: Cross multiply
    3,126.40x = 4,685.95 × 1,391.38
  4. Step 4: Simplify right side
    3,126.40x = 6,519,937.11
  5. Step 5: Solve for x
    x = 6,519,937.11/3,126.40
  6. Step 6: Final answer
    x = 2,085.45

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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.