Home / 20,988.72-28,968.03-14,269.77

Finding the Fourth Proportional to 20,988.72, 28,968.03 and 14,269.77

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Solution

The fourth proportional to 20,988.72, 28,968.03 and 14,269.77 is: 19,694.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,988.72 : 28,968.03 = 14,269.77 : x
  2. Step 2: Convert to fraction form
    20,988.72/28,968.03 = 14,269.77/x
  3. Step 3: Cross multiply
    20,988.72x = 28,968.03 × 14,269.77
  4. Step 4: Simplify right side
    20,988.72x = 413,367,125.45
  5. Step 5: Solve for x
    x = 413,367,125.45/20,988.72
  6. Step 6: Final answer
    x = 19,694.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.