Home / 20,818.23-28,729.84-11,386.79

Finding the Fourth Proportional to 20,818.23, 28,729.84 and 11,386.79

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Solution

The fourth proportional to 20,818.23, 28,729.84 and 11,386.79 is: 15,714.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.23 : 28,729.84 = 11,386.79 : x
  2. Step 2: Convert to fraction form
    20,818.23/28,729.84 = 11,386.79/x
  3. Step 3: Cross multiply
    20,818.23x = 28,729.84 × 11,386.79
  4. Step 4: Simplify right side
    20,818.23x = 327,140,698.17
  5. Step 5: Solve for x
    x = 327,140,698.17/20,818.23
  6. Step 6: Final answer
    x = 15,714.15

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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.