Home / 20,664.99-28,517.06-12,165.15

Finding the Fourth Proportional to 20,664.99, 28,517.06 and 12,165.15

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Solution

The fourth proportional to 20,664.99, 28,517.06 and 12,165.15 is: 16,787.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,664.99 : 28,517.06 = 12,165.15 : x
  2. Step 2: Convert to fraction form
    20,664.99/28,517.06 = 12,165.15/x
  3. Step 3: Cross multiply
    20,664.99x = 28,517.06 × 12,165.15
  4. Step 4: Simplify right side
    20,664.99x = 346,914,449.81
  5. Step 5: Solve for x
    x = 346,914,449.81/20,664.99
  6. Step 6: Final answer
    x = 16,787.55

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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.