Home / 7,139.90-10,710.88-2,209.92

Finding the Fourth Proportional to 7,139.90, 10,710.88 and 2,209.92

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Solution

The fourth proportional to 7,139.90, 10,710.88 and 2,209.92 is: 3,315.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.90 : 10,710.88 = 2,209.92 : x
  2. Step 2: Convert to fraction form
    7,139.90/10,710.88 = 2,209.92/x
  3. Step 3: Cross multiply
    7,139.90x = 10,710.88 × 2,209.92
  4. Step 4: Simplify right side
    7,139.90x = 23,670,187.93
  5. Step 5: Solve for x
    x = 23,670,187.93/7,139.90
  6. Step 6: Final answer
    x = 3,315.20

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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.