Home / 5,140.81-7,711.49-1,631.08

Finding the Fourth Proportional to 5,140.81, 7,711.49 and 1,631.08

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Solution

The fourth proportional to 5,140.81, 7,711.49 and 1,631.08 is: 2,446.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,140.81 : 7,711.49 = 1,631.08 : x
  2. Step 2: Convert to fraction form
    5,140.81/7,711.49 = 1,631.08/x
  3. Step 3: Cross multiply
    5,140.81x = 7,711.49 × 1,631.08
  4. Step 4: Simplify right side
    5,140.81x = 12,578,058.59
  5. Step 5: Solve for x
    x = 12,578,058.59/5,140.81
  6. Step 6: Final answer
    x = 2,446.71

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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.