Home / 12,891.60-19,338.30-5,099.40

Finding the Fourth Proportional to 12,891.60, 19,338.30 and 5,099.40

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Solution

The fourth proportional to 12,891.60, 19,338.30 and 5,099.40 is: 7,649.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,891.60 : 19,338.30 = 5,099.40 : x
  2. Step 2: Convert to fraction form
    12,891.60/19,338.30 = 5,099.40/x
  3. Step 3: Cross multiply
    12,891.60x = 19,338.30 × 5,099.40
  4. Step 4: Simplify right side
    12,891.60x = 98,613,727.02
  5. Step 5: Solve for x
    x = 98,613,727.02/12,891.60
  6. Step 6: Final answer
    x = 7,649.46

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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.