Home / 3,712.81-5,123.99-2,119.95

Finding the Fourth Proportional to 3,712.81, 5,123.99 and 2,119.95

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Solution

The fourth proportional to 3,712.81, 5,123.99 and 2,119.95 is: 2,925.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,712.81 : 5,123.99 = 2,119.95 : x
  2. Step 2: Convert to fraction form
    3,712.81/5,123.99 = 2,119.95/x
  3. Step 3: Cross multiply
    3,712.81x = 5,123.99 × 2,119.95
  4. Step 4: Simplify right side
    3,712.81x = 10,862,602.60
  5. Step 5: Solve for x
    x = 10,862,602.60/3,712.81
  6. Step 6: Final answer
    x = 2,925.71

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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.