Home / 21,332.79-31,985.51-8,861.42

Finding the Fourth Proportional to 21,332.79, 31,985.51 and 8,861.42

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Solution

The fourth proportional to 21,332.79, 31,985.51 and 8,861.42 is: 13,286.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,332.79 : 31,985.51 = 8,861.42 : x
  2. Step 2: Convert to fraction form
    21,332.79/31,985.51 = 8,861.42/x
  3. Step 3: Cross multiply
    21,332.79x = 31,985.51 × 8,861.42
  4. Step 4: Simplify right side
    21,332.79x = 283,436,833.79
  5. Step 5: Solve for x
    x = 283,436,833.79/21,332.79
  6. Step 6: Final answer
    x = 13,286.44

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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.