Home / 20,643.59-28,487.40-11,211.95

Finding the Fourth Proportional to 20,643.59, 28,487.40 and 11,211.95

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Solution

The fourth proportional to 20,643.59, 28,487.40 and 11,211.95 is: 15,472.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.59 : 28,487.40 = 11,211.95 : x
  2. Step 2: Convert to fraction form
    20,643.59/28,487.40 = 11,211.95/x
  3. Step 3: Cross multiply
    20,643.59x = 28,487.40 × 11,211.95
  4. Step 4: Simplify right side
    20,643.59x = 319,399,333.60
  5. Step 5: Solve for x
    x = 319,399,333.60/20,643.59
  6. Step 6: Final answer
    x = 15,472.08

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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.