Home / 21,050.67-31,575.93-12,279.42

Finding the Fourth Proportional to 21,050.67, 31,575.93 and 12,279.42

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Solution

The fourth proportional to 21,050.67, 31,575.93 and 12,279.42 is: 18,419.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,050.67 : 31,575.93 = 12,279.42 : x
  2. Step 2: Convert to fraction form
    21,050.67/31,575.93 = 12,279.42/x
  3. Step 3: Cross multiply
    21,050.67x = 31,575.93 × 12,279.42
  4. Step 4: Simplify right side
    21,050.67x = 387,734,106.36
  5. Step 5: Solve for x
    x = 387,734,106.36/21,050.67
  6. Step 6: Final answer
    x = 18,419.09

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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.