Home / 20,270.88-28,026-15,570.72

Finding the Fourth Proportional to 20,270.88, 28,026 and 15,570.72

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Solution

The fourth proportional to 20,270.88, 28,026 and 15,570.72 is: 21,527.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,270.88 : 28,026 = 15,570.72 : x
  2. Step 2: Convert to fraction form
    20,270.88/28,026 = 15,570.72/x
  3. Step 3: Cross multiply
    20,270.88x = 28,026 × 15,570.72
  4. Step 4: Simplify right side
    20,270.88x = 436,384,998.72
  5. Step 5: Solve for x
    x = 436,384,998.72/20,270.88
  6. Step 6: Final answer
    x = 21,527.68

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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.