Home / 21,787.11-30,065.11-12,225.80

Finding the Fourth Proportional to 21,787.11, 30,065.11 and 12,225.80

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Solution

The fourth proportional to 21,787.11, 30,065.11 and 12,225.80 is: 16,870.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,787.11 : 30,065.11 = 12,225.80 : x
  2. Step 2: Convert to fraction form
    21,787.11/30,065.11 = 12,225.80/x
  3. Step 3: Cross multiply
    21,787.11x = 30,065.11 × 12,225.80
  4. Step 4: Simplify right side
    21,787.11x = 367,570,066.44
  5. Step 5: Solve for x
    x = 367,570,066.44/21,787.11
  6. Step 6: Final answer
    x = 16,870.99

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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.