Home / 9,189.70-12,681.40-5,211.09

Finding the Fourth Proportional to 9,189.70, 12,681.40 and 5,211.09

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Solution

The fourth proportional to 9,189.70, 12,681.40 and 5,211.09 is: 7,191.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,189.70 : 12,681.40 = 5,211.09 : x
  2. Step 2: Convert to fraction form
    9,189.70/12,681.40 = 5,211.09/x
  3. Step 3: Cross multiply
    9,189.70x = 12,681.40 × 5,211.09
  4. Step 4: Simplify right side
    9,189.70x = 66,083,916.73
  5. Step 5: Solve for x
    x = 66,083,916.73/9,189.70
  6. Step 6: Final answer
    x = 7,191.09

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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.