Home / 7,639.60-11,459.40-5,015.20

Finding the Fourth Proportional to 7,639.60, 11,459.40 and 5,015.20

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Solution

The fourth proportional to 7,639.60, 11,459.40 and 5,015.20 is: 7,522.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,639.60 : 11,459.40 = 5,015.20 : x
  2. Step 2: Convert to fraction form
    7,639.60/11,459.40 = 5,015.20/x
  3. Step 3: Cross multiply
    7,639.60x = 11,459.40 × 5,015.20
  4. Step 4: Simplify right side
    7,639.60x = 57,471,182.88
  5. Step 5: Solve for x
    x = 57,471,182.88/7,639.60
  6. Step 6: Final answer
    x = 7,522.80

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