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Finding the Fourth Proportional to 7,080.60, 10,621.30 and 2,150.40

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Solution

The fourth proportional to 7,080.60, 10,621.30 and 2,150.40 is: 3,225.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,080.60 : 10,621.30 = 2,150.40 : x
  2. Step 2: Convert to fraction form
    7,080.60/10,621.30 = 2,150.40/x
  3. Step 3: Cross multiply
    7,080.60x = 10,621.30 × 2,150.40
  4. Step 4: Simplify right side
    7,080.60x = 22,840,043.52
  5. Step 5: Solve for x
    x = 22,840,043.52/7,080.60
  6. Step 6: Final answer
    x = 3,225.72

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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.