Home / 20,620.51-30,877.22-17,677.78

Finding the Fourth Proportional to 20,620.51, 30,877.22 and 17,677.78

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Solution

The fourth proportional to 20,620.51, 30,877.22 and 17,677.78 is: 26,470.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,620.51 : 30,877.22 = 17,677.78 : x
  2. Step 2: Convert to fraction form
    20,620.51/30,877.22 = 17,677.78/x
  3. Step 3: Cross multiply
    20,620.51x = 30,877.22 × 17,677.78
  4. Step 4: Simplify right side
    20,620.51x = 545,840,669.17
  5. Step 5: Solve for x
    x = 545,840,669.17/20,620.51
  6. Step 6: Final answer
    x = 26,470.77

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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.