Home / 28,245.72-38,979.50-15,500.16

Finding the Fourth Proportional to 28,245.72, 38,979.50 and 15,500.16

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Solution

The fourth proportional to 28,245.72, 38,979.50 and 15,500.16 is: 21,390.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,245.72 : 38,979.50 = 15,500.16 : x
  2. Step 2: Convert to fraction form
    28,245.72/38,979.50 = 15,500.16/x
  3. Step 3: Cross multiply
    28,245.72x = 38,979.50 × 15,500.16
  4. Step 4: Simplify right side
    28,245.72x = 604,188,486.72
  5. Step 5: Solve for x
    x = 604,188,486.72/28,245.72
  6. Step 6: Final answer
    x = 21,390.44

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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.