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Finding the Fourth Proportional to 7,109.70, 10,655.55 and 2,721.30

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Solution

The fourth proportional to 7,109.70, 10,655.55 and 2,721.30 is: 4,078.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,109.70 : 10,655.55 = 2,721.30 : x
  2. Step 2: Convert to fraction form
    7,109.70/10,655.55 = 2,721.30/x
  3. Step 3: Cross multiply
    7,109.70x = 10,655.55 × 2,721.30
  4. Step 4: Simplify right side
    7,109.70x = 28,996,948.22
  5. Step 5: Solve for x
    x = 28,996,948.22/7,109.70
  6. Step 6: Final answer
    x = 4,078.51

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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.