Home / 15,842.31-21,855.56-9,123.94

Finding the Fourth Proportional to 15,842.31, 21,855.56 and 9,123.94

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Solution

The fourth proportional to 15,842.31, 21,855.56 and 9,123.94 is: 12,587.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,842.31 : 21,855.56 = 9,123.94 : x
  2. Step 2: Convert to fraction form
    15,842.31/21,855.56 = 9,123.94/x
  3. Step 3: Cross multiply
    15,842.31x = 21,855.56 × 9,123.94
  4. Step 4: Simplify right side
    15,842.31x = 199,408,786.28
  5. Step 5: Solve for x
    x = 199,408,786.28/15,842.31
  6. Step 6: Final answer
    x = 12,587.11

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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.