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Finding the Fourth Proportional to 20,752.66, 28,566.66 and 15,707.98

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Solution

The fourth proportional to 20,752.66, 28,566.66 and 15,707.98 is: 21,622.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,752.66 : 28,566.66 = 15,707.98 : x
  2. Step 2: Convert to fraction form
    20,752.66/28,566.66 = 15,707.98/x
  3. Step 3: Cross multiply
    20,752.66x = 28,566.66 × 15,707.98
  4. Step 4: Simplify right side
    20,752.66x = 448,724,523.95
  5. Step 5: Solve for x
    x = 448,724,523.95/20,752.66
  6. Step 6: Final answer
    x = 21,622.51

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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.