Home / 12,431.72-17,155.77-6,842.72

Finding the Fourth Proportional to 12,431.72, 17,155.77 and 6,842.72

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Solution

The fourth proportional to 12,431.72, 17,155.77 and 6,842.72 is: 9,442.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,431.72 : 17,155.77 = 6,842.72 : x
  2. Step 2: Convert to fraction form
    12,431.72/17,155.77 = 6,842.72/x
  3. Step 3: Cross multiply
    12,431.72x = 17,155.77 × 6,842.72
  4. Step 4: Simplify right side
    12,431.72x = 117,392,173.38
  5. Step 5: Solve for x
    x = 117,392,173.38/12,431.72
  6. Step 6: Final answer
    x = 9,442.95

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Half scale
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Double scale
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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.