Home / 12,721.12-19,069.04-5,330.72

Finding the Fourth Proportional to 12,721.12, 19,069.04 and 5,330.72

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Solution

The fourth proportional to 12,721.12, 19,069.04 and 5,330.72 is: 7,990.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.12 : 19,069.04 = 5,330.72 : x
  2. Step 2: Convert to fraction form
    12,721.12/19,069.04 = 5,330.72/x
  3. Step 3: Cross multiply
    12,721.12x = 19,069.04 × 5,330.72
  4. Step 4: Simplify right side
    12,721.12x = 101,651,712.91
  5. Step 5: Solve for x
    x = 101,651,712.91/12,721.12
  6. Step 6: Final answer
    x = 7,990.78

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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.