Home / 5,640.28-7,784.04-3,123.18

Finding the Fourth Proportional to 5,640.28, 7,784.04 and 3,123.18

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Solution

The fourth proportional to 5,640.28, 7,784.04 and 3,123.18 is: 4,310.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,640.28 : 7,784.04 = 3,123.18 : x
  2. Step 2: Convert to fraction form
    5,640.28/7,784.04 = 3,123.18/x
  3. Step 3: Cross multiply
    5,640.28x = 7,784.04 × 3,123.18
  4. Step 4: Simplify right side
    5,640.28x = 24,310,969.69
  5. Step 5: Solve for x
    x = 24,310,969.69/5,640.28
  6. Step 6: Final answer
    x = 4,310.24

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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.