Home / 20,886.64-28,823.17-11,811.88

Finding the Fourth Proportional to 20,886.64, 28,823.17 and 11,811.88

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Solution

The fourth proportional to 20,886.64, 28,823.17 and 11,811.88 is: 16,300.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,886.64 : 28,823.17 = 11,811.88 : x
  2. Step 2: Convert to fraction form
    20,886.64/28,823.17 = 11,811.88/x
  3. Step 3: Cross multiply
    20,886.64x = 28,823.17 × 11,811.88
  4. Step 4: Simplify right side
    20,886.64x = 340,455,825.26
  5. Step 5: Solve for x
    x = 340,455,825.26/20,886.64
  6. Step 6: Final answer
    x = 16,300.17

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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.