Home / 20,643.16-28,487.82-11,211.88

Finding the Fourth Proportional to 20,643.16, 28,487.82 and 11,211.88

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Solution

The fourth proportional to 20,643.16, 28,487.82 and 11,211.88 is: 15,472.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.16 : 28,487.82 = 11,211.88 : x
  2. Step 2: Convert to fraction form
    20,643.16/28,487.82 = 11,211.88/x
  3. Step 3: Cross multiply
    20,643.16x = 28,487.82 × 11,211.88
  4. Step 4: Simplify right side
    20,643.16x = 319,402,019.30
  5. Step 5: Solve for x
    x = 319,402,019.30/20,643.16
  6. Step 6: Final answer
    x = 15,472.54

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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.