Home / 20,886.51-31,307.79-6,842.88

Finding the Fourth Proportional to 20,886.51, 31,307.79 and 6,842.88

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Solution

The fourth proportional to 20,886.51, 31,307.79 and 6,842.88 is: 10,257.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,886.51 : 31,307.79 = 6,842.88 : x
  2. Step 2: Convert to fraction form
    20,886.51/31,307.79 = 6,842.88/x
  3. Step 3: Cross multiply
    20,886.51x = 31,307.79 × 6,842.88
  4. Step 4: Simplify right side
    20,886.51x = 214,235,456.45
  5. Step 5: Solve for x
    x = 214,235,456.45/20,886.51
  6. Step 6: Final answer
    x = 10,257.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.