Home / 20,881.13-31,321.08-7,733.21

Finding the Fourth Proportional to 20,881.13, 31,321.08 and 7,733.21

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Solution

The fourth proportional to 20,881.13, 31,321.08 and 7,733.21 is: 11,599.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.13 : 31,321.08 = 7,733.21 : x
  2. Step 2: Convert to fraction form
    20,881.13/31,321.08 = 7,733.21/x
  3. Step 3: Cross multiply
    20,881.13x = 31,321.08 × 7,733.21
  4. Step 4: Simplify right side
    20,881.13x = 242,212,332.46
  5. Step 5: Solve for x
    x = 242,212,332.46/20,881.13
  6. Step 6: Final answer
    x = 11,599.58

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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.