Home / 20,818.14-28,729.26-11,386.50

Finding the Fourth Proportional to 20,818.14, 28,729.26 and 11,386.50

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Solution

The fourth proportional to 20,818.14, 28,729.26 and 11,386.50 is: 15,713.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.14 : 28,729.26 = 11,386.50 : x
  2. Step 2: Convert to fraction form
    20,818.14/28,729.26 = 11,386.50/x
  3. Step 3: Cross multiply
    20,818.14x = 28,729.26 × 11,386.50
  4. Step 4: Simplify right side
    20,818.14x = 327,125,718.99
  5. Step 5: Solve for x
    x = 327,125,718.99/20,818.14
  6. Step 6: Final answer
    x = 15,713.49

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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.