Home / 7,155.77-9,874.97-3,969.56

Finding the Fourth Proportional to 7,155.77, 9,874.97 and 3,969.56

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Solution

The fourth proportional to 7,155.77, 9,874.97 and 3,969.56 is: 5,478.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,155.77 : 9,874.97 = 3,969.56 : x
  2. Step 2: Convert to fraction form
    7,155.77/9,874.97 = 3,969.56/x
  3. Step 3: Cross multiply
    7,155.77x = 9,874.97 × 3,969.56
  4. Step 4: Simplify right side
    7,155.77x = 39,199,320.52
  5. Step 5: Solve for x
    x = 39,199,320.52/7,155.77
  6. Step 6: Final answer
    x = 5,478.00

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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.