Home / 21,253.49-31,877.61-8,771.90

Finding the Fourth Proportional to 21,253.49, 31,877.61 and 8,771.90

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Solution

The fourth proportional to 21,253.49, 31,877.61 and 8,771.90 is: 13,156.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,253.49 : 31,877.61 = 8,771.90 : x
  2. Step 2: Convert to fraction form
    21,253.49/31,877.61 = 8,771.90/x
  3. Step 3: Cross multiply
    21,253.49x = 31,877.61 × 8,771.90
  4. Step 4: Simplify right side
    21,253.49x = 279,627,207.16
  5. Step 5: Solve for x
    x = 279,627,207.16/21,253.49
  6. Step 6: Final answer
    x = 13,156.77

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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.