Home / 6,665.60-9,986.40-3,195.20

Finding the Fourth Proportional to 6,665.60, 9,986.40 and 3,195.20

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Solution

The fourth proportional to 6,665.60, 9,986.40 and 3,195.20 is: 4,787.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,665.60 : 9,986.40 = 3,195.20 : x
  2. Step 2: Convert to fraction form
    6,665.60/9,986.40 = 3,195.20/x
  3. Step 3: Cross multiply
    6,665.60x = 9,986.40 × 3,195.20
  4. Step 4: Simplify right side
    6,665.60x = 31,908,545.28
  5. Step 5: Solve for x
    x = 31,908,545.28/6,665.60
  6. Step 6: Final answer
    x = 4,787.05

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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.