Home / 11,171.91-15,417.60-6,456.19

Finding the Fourth Proportional to 11,171.91, 15,417.60 and 6,456.19

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Solution

The fourth proportional to 11,171.91, 15,417.60 and 6,456.19 is: 8,909.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,171.91 : 15,417.60 = 6,456.19 : x
  2. Step 2: Convert to fraction form
    11,171.91/15,417.60 = 6,456.19/x
  3. Step 3: Cross multiply
    11,171.91x = 15,417.60 × 6,456.19
  4. Step 4: Simplify right side
    11,171.91x = 99,538,954.94
  5. Step 5: Solve for x
    x = 99,538,954.94/11,171.91
  6. Step 6: Final answer
    x = 8,909.75

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Half scale
Find fourth proportional to 22,343.82, 30,835.20 and 12,912.38
Double scale
Find fourth proportional to 11,172.91, 15,418.98 and 6,457.19
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.