Home / 12,645.63-17,427.84-8,389.18

Finding the Fourth Proportional to 12,645.63, 17,427.84 and 8,389.18

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Solution

The fourth proportional to 12,645.63, 17,427.84 and 8,389.18 is: 11,561.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,645.63 : 17,427.84 = 8,389.18 : x
  2. Step 2: Convert to fraction form
    12,645.63/17,427.84 = 8,389.18/x
  3. Step 3: Cross multiply
    12,645.63x = 17,427.84 × 8,389.18
  4. Step 4: Simplify right side
    12,645.63x = 146,205,324.29
  5. Step 5: Solve for x
    x = 146,205,324.29/12,645.63
  6. Step 6: Final answer
    x = 11,561.73

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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.