Home / 4,815.17-6,642.47-3,139.38

Finding the Fourth Proportional to 4,815.17, 6,642.47 and 3,139.38

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Solution

The fourth proportional to 4,815.17, 6,642.47 and 3,139.38 is: 4,330.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,815.17 : 6,642.47 = 3,139.38 : x
  2. Step 2: Convert to fraction form
    4,815.17/6,642.47 = 3,139.38/x
  3. Step 3: Cross multiply
    4,815.17x = 6,642.47 × 3,139.38
  4. Step 4: Simplify right side
    4,815.17x = 20,853,221.77
  5. Step 5: Solve for x
    x = 20,853,221.77/4,815.17
  6. Step 6: Final answer
    x = 4,330.74

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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.