Home / 28,191.87-38,887.70-18,631.85

Finding the Fourth Proportional to 28,191.87, 38,887.70 and 18,631.85

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Solution

The fourth proportional to 28,191.87, 38,887.70 and 18,631.85 is: 25,700.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,191.87 : 38,887.70 = 18,631.85 : x
  2. Step 2: Convert to fraction form
    28,191.87/38,887.70 = 18,631.85/x
  3. Step 3: Cross multiply
    28,191.87x = 38,887.70 × 18,631.85
  4. Step 4: Simplify right side
    28,191.87x = 724,549,505.65
  5. Step 5: Solve for x
    x = 724,549,505.65/28,191.87
  6. Step 6: Final answer
    x = 25,700.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.