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Finding the Fourth Proportional to 7,227.20, 10,840.80 and 7,150.40

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Solution

The fourth proportional to 7,227.20, 10,840.80 and 7,150.40 is: 10,725.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,227.20 : 10,840.80 = 7,150.40 : x
  2. Step 2: Convert to fraction form
    7,227.20/10,840.80 = 7,150.40/x
  3. Step 3: Cross multiply
    7,227.20x = 10,840.80 × 7,150.40
  4. Step 4: Simplify right side
    7,227.20x = 77,516,056.32
  5. Step 5: Solve for x
    x = 77,516,056.32/7,227.20
  6. Step 6: Final answer
    x = 10,725.60

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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.