Home / 12,425.99-17,148.20-7,120.44

Finding the Fourth Proportional to 12,425.99, 17,148.20 and 7,120.44

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Solution

The fourth proportional to 12,425.99, 17,148.20 and 7,120.44 is: 9,826.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,425.99 : 17,148.20 = 7,120.44 : x
  2. Step 2: Convert to fraction form
    12,425.99/17,148.20 = 7,120.44/x
  3. Step 3: Cross multiply
    12,425.99x = 17,148.20 × 7,120.44
  4. Step 4: Simplify right side
    12,425.99x = 122,102,693.61
  5. Step 5: Solve for x
    x = 122,102,693.61/12,425.99
  6. Step 6: Final answer
    x = 9,826.40

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Half scale
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Double scale
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Similar ratio
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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.