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Finding the Fourth Proportional to 18,888.75, 28,325.57 and 5,738.67

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Solution

The fourth proportional to 18,888.75, 28,325.57 and 5,738.67 is: 8,605.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,888.75 : 28,325.57 = 5,738.67 : x
  2. Step 2: Convert to fraction form
    18,888.75/28,325.57 = 5,738.67/x
  3. Step 3: Cross multiply
    18,888.75x = 28,325.57 × 5,738.67
  4. Step 4: Simplify right side
    18,888.75x = 162,551,070.10
  5. Step 5: Solve for x
    x = 162,551,070.10/18,888.75
  6. Step 6: Final answer
    x = 8,605.71

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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.