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Finding the Fourth Proportional to 7,139.95, 10,710.95 and 2,209.97

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Solution

The fourth proportional to 7,139.95, 10,710.95 and 2,209.97 is: 3,315.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.95 : 10,710.95 = 2,209.97 : x
  2. Step 2: Convert to fraction form
    7,139.95/10,710.95 = 2,209.97/x
  3. Step 3: Cross multiply
    7,139.95x = 10,710.95 × 2,209.97
  4. Step 4: Simplify right side
    7,139.95x = 23,670,893.90
  5. Step 5: Solve for x
    x = 23,670,893.90/7,139.95
  6. Step 6: Final answer
    x = 3,315.28

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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.