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Finding the Fourth Proportional to 22,420.95, 30,936.17 and 12,860.12

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Solution

The fourth proportional to 22,420.95, 30,936.17 and 12,860.12 is: 17,744.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,420.95 : 30,936.17 = 12,860.12 : x
  2. Step 2: Convert to fraction form
    22,420.95/30,936.17 = 12,860.12/x
  3. Step 3: Cross multiply
    22,420.95x = 30,936.17 × 12,860.12
  4. Step 4: Simplify right side
    22,420.95x = 397,842,639.56
  5. Step 5: Solve for x
    x = 397,842,639.56/22,420.95
  6. Step 6: Final answer
    x = 17,744.24

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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.