Home / 7,639.80-11,459.70-5,166.60

Finding the Fourth Proportional to 7,639.80, 11,459.70 and 5,166.60

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Solution

The fourth proportional to 7,639.80, 11,459.70 and 5,166.60 is: 7,749.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,639.80 : 11,459.70 = 5,166.60 : x
  2. Step 2: Convert to fraction form
    7,639.80/11,459.70 = 5,166.60/x
  3. Step 3: Cross multiply
    7,639.80x = 11,459.70 × 5,166.60
  4. Step 4: Simplify right side
    7,639.80x = 59,207,686.02
  5. Step 5: Solve for x
    x = 59,207,686.02/7,639.80
  6. Step 6: Final answer
    x = 7,749.90

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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.