Home / 2,139.17-2,951.66-1,475.78

Finding the Fourth Proportional to 2,139.17, 2,951.66 and 1,475.78

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Solution

The fourth proportional to 2,139.17, 2,951.66 and 1,475.78 is: 2,036.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.17 : 2,951.66 = 1,475.78 : x
  2. Step 2: Convert to fraction form
    2,139.17/2,951.66 = 1,475.78/x
  3. Step 3: Cross multiply
    2,139.17x = 2,951.66 × 1,475.78
  4. Step 4: Simplify right side
    2,139.17x = 4,356,000.79
  5. Step 5: Solve for x
    x = 4,356,000.79/2,139.17
  6. Step 6: Final answer
    x = 2,036.30

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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.