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Finding the Fourth Proportional to 20,822.57, 28,726.95 and 12,850.95

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Solution

The fourth proportional to 20,822.57, 28,726.95 and 12,850.95 is: 17,729.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,822.57 : 28,726.95 = 12,850.95 : x
  2. Step 2: Convert to fraction form
    20,822.57/28,726.95 = 12,850.95/x
  3. Step 3: Cross multiply
    20,822.57x = 28,726.95 × 12,850.95
  4. Step 4: Simplify right side
    20,822.57x = 369,168,754.02
  5. Step 5: Solve for x
    x = 369,168,754.02/20,822.57
  6. Step 6: Final answer
    x = 17,729.26

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1.5x scale

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.