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Finding the Fourth Proportional to 7,310.40, 10,221.60 and 7,310.40

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Solution

The fourth proportional to 7,310.40, 10,221.60 and 7,310.40 is: 10,221.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,310.40 : 10,221.60 = 7,310.40 : x
  2. Step 2: Convert to fraction form
    7,310.40/10,221.60 = 7,310.40/x
  3. Step 3: Cross multiply
    7,310.40x = 10,221.60 × 7,310.40
  4. Step 4: Simplify right side
    7,310.40x = 74,723,984.64
  5. Step 5: Solve for x
    x = 74,723,984.64/7,310.40
  6. Step 6: Final answer
    x = 10,221.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.