Home / 2,138.39-2,947.68-1,507.11

Finding the Fourth Proportional to 2,138.39, 2,947.68 and 1,507.11

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Solution

The fourth proportional to 2,138.39, 2,947.68 and 1,507.11 is: 2,077.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.39 : 2,947.68 = 1,507.11 : x
  2. Step 2: Convert to fraction form
    2,138.39/2,947.68 = 1,507.11/x
  3. Step 3: Cross multiply
    2,138.39x = 2,947.68 × 1,507.11
  4. Step 4: Simplify right side
    2,138.39x = 4,442,478.00
  5. Step 5: Solve for x
    x = 4,442,478.00/2,138.39
  6. Step 6: Final answer
    x = 2,077.49

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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.