Home / 28,296.40-39,047.88-15,721.96

Finding the Fourth Proportional to 28,296.40, 39,047.88 and 15,721.96

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Solution

The fourth proportional to 28,296.40, 39,047.88 and 15,721.96 is: 21,695.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,296.40 : 39,047.88 = 15,721.96 : x
  2. Step 2: Convert to fraction form
    28,296.40/39,047.88 = 15,721.96/x
  3. Step 3: Cross multiply
    28,296.40x = 39,047.88 × 15,721.96
  4. Step 4: Simplify right side
    28,296.40x = 613,909,207.44
  5. Step 5: Solve for x
    x = 613,909,207.44/28,296.40
  6. Step 6: Final answer
    x = 21,695.66

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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.