Home / 18,721.57-28,082.34-4,870.57

Finding the Fourth Proportional to 18,721.57, 28,082.34 and 4,870.57

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Solution

The fourth proportional to 18,721.57, 28,082.34 and 4,870.57 is: 7,305.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.57 : 28,082.34 = 4,870.57 : x
  2. Step 2: Convert to fraction form
    18,721.57/28,082.34 = 4,870.57/x
  3. Step 3: Cross multiply
    18,721.57x = 28,082.34 × 4,870.57
  4. Step 4: Simplify right side
    18,721.57x = 136,777,002.73
  5. Step 5: Solve for x
    x = 136,777,002.73/18,721.57
  6. Step 6: Final answer
    x = 7,305.85

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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.