Home / 28,499.57-42,758-20,195.65

Finding the Fourth Proportional to 28,499.57, 42,758 and 20,195.65

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Solution

The fourth proportional to 28,499.57, 42,758 and 20,195.65 is: 30,299.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,499.57 : 42,758 = 20,195.65 : x
  2. Step 2: Convert to fraction form
    28,499.57/42,758 = 20,195.65/x
  3. Step 3: Cross multiply
    28,499.57x = 42,758 × 20,195.65
  4. Step 4: Simplify right side
    28,499.57x = 863,525,602.70
  5. Step 5: Solve for x
    x = 863,525,602.70/28,499.57
  6. Step 6: Final answer
    x = 30,299.60

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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.