Home / 18,721.47-28,082.15-7,625.55

Finding the Fourth Proportional to 18,721.47, 28,082.15 and 7,625.55

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Solution

The fourth proportional to 18,721.47, 28,082.15 and 7,625.55 is: 11,438.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.47 : 28,082.15 = 7,625.55 : x
  2. Step 2: Convert to fraction form
    18,721.47/28,082.15 = 7,625.55/x
  3. Step 3: Cross multiply
    18,721.47x = 28,082.15 × 7,625.55
  4. Step 4: Simplify right side
    18,721.47x = 214,141,858.00
  5. Step 5: Solve for x
    x = 214,141,858.00/18,721.47
  6. Step 6: Final answer
    x = 11,438.30

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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.