Home / 12,428.11-17,150.85-7,123.24

Finding the Fourth Proportional to 12,428.11, 17,150.85 and 7,123.24

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Solution

The fourth proportional to 12,428.11, 17,150.85 and 7,123.24 is: 9,830.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428.11 : 17,150.85 = 7,123.24 : x
  2. Step 2: Convert to fraction form
    12,428.11/17,150.85 = 7,123.24/x
  3. Step 3: Cross multiply
    12,428.11x = 17,150.85 × 7,123.24
  4. Step 4: Simplify right side
    12,428.11x = 122,169,620.75
  5. Step 5: Solve for x
    x = 122,169,620.75/12,428.11
  6. Step 6: Final answer
    x = 9,830.10

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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.