Home / 7,139.85-9,852.79-4,155.62

Finding the Fourth Proportional to 7,139.85, 9,852.79 and 4,155.62

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Solution

The fourth proportional to 7,139.85, 9,852.79 and 4,155.62 is: 5,734.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.85 : 9,852.79 = 4,155.62 : x
  2. Step 2: Convert to fraction form
    7,139.85/9,852.79 = 4,155.62/x
  3. Step 3: Cross multiply
    7,139.85x = 9,852.79 × 4,155.62
  4. Step 4: Simplify right side
    7,139.85x = 40,944,451.18
  5. Step 5: Solve for x
    x = 40,944,451.18/7,139.85
  6. Step 6: Final answer
    x = 5,734.64

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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.