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Finding the Fourth Proportional to 7,292.40, 10,938.60 and 6,860.40

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Solution

The fourth proportional to 7,292.40, 10,938.60 and 6,860.40 is: 10,290.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,292.40 : 10,938.60 = 6,860.40 : x
  2. Step 2: Convert to fraction form
    7,292.40/10,938.60 = 6,860.40/x
  3. Step 3: Cross multiply
    7,292.40x = 10,938.60 × 6,860.40
  4. Step 4: Simplify right side
    7,292.40x = 75,043,171.44
  5. Step 5: Solve for x
    x = 75,043,171.44/7,292.40
  6. Step 6: Final answer
    x = 10,290.60

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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.