Home / 12,631.84-17,428.44-8,155.78

Finding the Fourth Proportional to 12,631.84, 17,428.44 and 8,155.78

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Solution

The fourth proportional to 12,631.84, 17,428.44 and 8,155.78 is: 11,252.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,631.84 : 17,428.44 = 8,155.78 : x
  2. Step 2: Convert to fraction form
    12,631.84/17,428.44 = 8,155.78/x
  3. Step 3: Cross multiply
    12,631.84x = 17,428.44 × 8,155.78
  4. Step 4: Simplify right side
    12,631.84x = 142,142,522.38
  5. Step 5: Solve for x
    x = 142,142,522.38/12,631.84
  6. Step 6: Final answer
    x = 11,252.72

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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.