Home / 28,338.75-42,509.88-8,618.76

Finding the Fourth Proportional to 28,338.75, 42,509.88 and 8,618.76

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Solution

The fourth proportional to 28,338.75, 42,509.88 and 8,618.76 is: 12,928.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,338.75 : 42,509.88 = 8,618.76 : x
  2. Step 2: Convert to fraction form
    28,338.75/42,509.88 = 8,618.76/x
  3. Step 3: Cross multiply
    28,338.75x = 42,509.88 × 8,618.76
  4. Step 4: Simplify right side
    28,338.75x = 366,382,453.35
  5. Step 5: Solve for x
    x = 366,382,453.35/28,338.75
  6. Step 6: Final answer
    x = 12,928.67

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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.