Home / 3,071.52-4,233.68-2,138.40

Finding the Fourth Proportional to 3,071.52, 4,233.68 and 2,138.40

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Solution

The fourth proportional to 3,071.52, 4,233.68 and 2,138.40 is: 2,947.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,071.52 : 4,233.68 = 2,138.40 : x
  2. Step 2: Convert to fraction form
    3,071.52/4,233.68 = 2,138.40/x
  3. Step 3: Cross multiply
    3,071.52x = 4,233.68 × 2,138.40
  4. Step 4: Simplify right side
    3,071.52x = 9,053,301.31
  5. Step 5: Solve for x
    x = 9,053,301.31/3,071.52
  6. Step 6: Final answer
    x = 2,947.50

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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.