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Finding the Fourth Proportional to 6,891.20, 9,673.60 and 6,891.20

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Solution

The fourth proportional to 6,891.20, 9,673.60 and 6,891.20 is: 9,673.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,891.20 : 9,673.60 = 6,891.20 : x
  2. Step 2: Convert to fraction form
    6,891.20/9,673.60 = 6,891.20/x
  3. Step 3: Cross multiply
    6,891.20x = 9,673.60 × 6,891.20
  4. Step 4: Simplify right side
    6,891.20x = 66,662,712.32
  5. Step 5: Solve for x
    x = 66,662,712.32/6,891.20
  6. Step 6: Final answer
    x = 9,673.60

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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.