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Finding the Fourth Proportional to 7,281.09, 10,921.64 and 2,086.97

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Solution

The fourth proportional to 7,281.09, 10,921.64 and 2,086.97 is: 3,130.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,281.09 : 10,921.64 = 2,086.97 : x
  2. Step 2: Convert to fraction form
    7,281.09/10,921.64 = 2,086.97/x
  3. Step 3: Cross multiply
    7,281.09x = 10,921.64 × 2,086.97
  4. Step 4: Simplify right side
    7,281.09x = 22,793,069.99
  5. Step 5: Solve for x
    x = 22,793,069.99/7,281.09
  6. Step 6: Final answer
    x = 3,130.45

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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.