Home / 7,123.28-9,830.58-3,979.68

Finding the Fourth Proportional to 7,123.28, 9,830.58 and 3,979.68

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Solution

The fourth proportional to 7,123.28, 9,830.58 and 3,979.68 is: 5,492.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,123.28 : 9,830.58 = 3,979.68 : x
  2. Step 2: Convert to fraction form
    7,123.28/9,830.58 = 3,979.68/x
  3. Step 3: Cross multiply
    7,123.28x = 9,830.58 × 3,979.68
  4. Step 4: Simplify right side
    7,123.28x = 39,122,562.61
  5. Step 5: Solve for x
    x = 39,122,562.61/7,123.28
  6. Step 6: Final answer
    x = 5,492.21

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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.