Home / 7,120.60-10,680.90-4,787.80

Finding the Fourth Proportional to 7,120.60, 10,680.90 and 4,787.80

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Solution

The fourth proportional to 7,120.60, 10,680.90 and 4,787.80 is: 7,181.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.60 : 10,680.90 = 4,787.80 : x
  2. Step 2: Convert to fraction form
    7,120.60/10,680.90 = 4,787.80/x
  3. Step 3: Cross multiply
    7,120.60x = 10,680.90 × 4,787.80
  4. Step 4: Simplify right side
    7,120.60x = 51,138,013.02
  5. Step 5: Solve for x
    x = 51,138,013.02/7,120.60
  6. Step 6: Final answer
    x = 7,181.70

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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.