Home / 7,139.27-9,851.42-4,155.71

Finding the Fourth Proportional to 7,139.27, 9,851.42 and 4,155.71

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Solution

The fourth proportional to 7,139.27, 9,851.42 and 4,155.71 is: 5,734.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.27 : 9,851.42 = 4,155.71 : x
  2. Step 2: Convert to fraction form
    7,139.27/9,851.42 = 4,155.71/x
  3. Step 3: Cross multiply
    7,139.27x = 9,851.42 × 4,155.71
  4. Step 4: Simplify right side
    7,139.27x = 40,939,605.74
  5. Step 5: Solve for x
    x = 40,939,605.74/7,139.27
  6. Step 6: Final answer
    x = 5,734.42

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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.