Home / 20,412.60-30,618.90-7,266.30

Finding the Fourth Proportional to 20,412.60, 30,618.90 and 7,266.30

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Solution

The fourth proportional to 20,412.60, 30,618.90 and 7,266.30 is: 10,899.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,412.60 : 30,618.90 = 7,266.30 : x
  2. Step 2: Convert to fraction form
    20,412.60/30,618.90 = 7,266.30/x
  3. Step 3: Cross multiply
    20,412.60x = 30,618.90 × 7,266.30
  4. Step 4: Simplify right side
    20,412.60x = 222,486,113.07
  5. Step 5: Solve for x
    x = 222,486,113.07/20,412.60
  6. Step 6: Final answer
    x = 10,899.45

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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.