Home / 28,016.08-38,663.92-15,440.80

Finding the Fourth Proportional to 28,016.08, 38,663.92 and 15,440.80

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Solution

The fourth proportional to 28,016.08, 38,663.92 and 15,440.80 is: 21,309.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,016.08 : 38,663.92 = 15,440.80 : x
  2. Step 2: Convert to fraction form
    28,016.08/38,663.92 = 15,440.80/x
  3. Step 3: Cross multiply
    28,016.08x = 38,663.92 × 15,440.80
  4. Step 4: Simplify right side
    28,016.08x = 597,001,855.94
  5. Step 5: Solve for x
    x = 597,001,855.94/28,016.08
  6. Step 6: Final answer
    x = 21,309.26

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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.