Home / 21,330.39-31,981.87-8,859.01

Finding the Fourth Proportional to 21,330.39, 31,981.87 and 8,859.01

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Solution

The fourth proportional to 21,330.39, 31,981.87 and 8,859.01 is: 13,282.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,330.39 : 31,981.87 = 8,859.01 : x
  2. Step 2: Convert to fraction form
    21,330.39/31,981.87 = 8,859.01/x
  3. Step 3: Cross multiply
    21,330.39x = 31,981.87 × 8,859.01
  4. Step 4: Simplify right side
    21,330.39x = 283,327,706.15
  5. Step 5: Solve for x
    x = 283,327,706.15/21,330.39
  6. Step 6: Final answer
    x = 13,282.82

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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.