Home / 28,245.57-38,979.62-15,499.31

Finding the Fourth Proportional to 28,245.57, 38,979.62 and 15,499.31

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Solution

The fourth proportional to 28,245.57, 38,979.62 and 15,499.31 is: 21,389.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,245.57 : 38,979.62 = 15,499.31 : x
  2. Step 2: Convert to fraction form
    28,245.57/38,979.62 = 15,499.31/x
  3. Step 3: Cross multiply
    28,245.57x = 38,979.62 × 15,499.31
  4. Step 4: Simplify right side
    28,245.57x = 604,156,941.67
  5. Step 5: Solve for x
    x = 604,156,941.67/28,245.57
  6. Step 6: Final answer
    x = 21,389.44

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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.