Home / 11,325.40-16,988.10-7,990.36

Finding the Fourth Proportional to 11,325.40, 16,988.10 and 7,990.36

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Solution

The fourth proportional to 11,325.40, 16,988.10 and 7,990.36 is: 11,985.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,325.40 : 16,988.10 = 7,990.36 : x
  2. Step 2: Convert to fraction form
    11,325.40/16,988.10 = 7,990.36/x
  3. Step 3: Cross multiply
    11,325.40x = 16,988.10 × 7,990.36
  4. Step 4: Simplify right side
    11,325.40x = 135,741,034.72
  5. Step 5: Solve for x
    x = 135,741,034.72/11,325.40
  6. Step 6: Final answer
    x = 11,985.54

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.