Home / 21,207.40-31,811.68-5,625

Finding the Fourth Proportional to 21,207.40, 31,811.68 and 5,625

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Solution

The fourth proportional to 21,207.40, 31,811.68 and 5,625 is: 8,437.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,207.40 : 31,811.68 = 5,625 : x
  2. Step 2: Convert to fraction form
    21,207.40/31,811.68 = 5,625/x
  3. Step 3: Cross multiply
    21,207.40x = 31,811.68 × 5,625
  4. Step 4: Simplify right side
    21,207.40x = 178,940,700
  5. Step 5: Solve for x
    x = 178,940,700/21,207.40
  6. Step 6: Final answer
    x = 8,437.65

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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.