Home / 7,149.80-9,865.78-4,125.04

Finding the Fourth Proportional to 7,149.80, 9,865.78 and 4,125.04

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Solution

The fourth proportional to 7,149.80, 9,865.78 and 4,125.04 is: 5,692.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,149.80 : 9,865.78 = 4,125.04 : x
  2. Step 2: Convert to fraction form
    7,149.80/9,865.78 = 4,125.04/x
  3. Step 3: Cross multiply
    7,149.80x = 9,865.78 × 4,125.04
  4. Step 4: Simplify right side
    7,149.80x = 40,696,737.13
  5. Step 5: Solve for x
    x = 40,696,737.13/7,149.80
  6. Step 6: Final answer
    x = 5,692.01

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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.