Home / 20,440.64-28,206.80-11,488.02

Finding the Fourth Proportional to 20,440.64, 28,206.80 and 11,488.02

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Solution

The fourth proportional to 20,440.64, 28,206.80 and 11,488.02 is: 15,852.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440.64 : 28,206.80 = 11,488.02 : x
  2. Step 2: Convert to fraction form
    20,440.64/28,206.80 = 11,488.02/x
  3. Step 3: Cross multiply
    20,440.64x = 28,206.80 × 11,488.02
  4. Step 4: Simplify right side
    20,440.64x = 324,040,084.06
  5. Step 5: Solve for x
    x = 324,040,084.06/20,440.64
  6. Step 6: Final answer
    x = 15,852.74

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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.