Home / 21,788.29-30,065.36-12,226.20

Finding the Fourth Proportional to 21,788.29, 30,065.36 and 12,226.20

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Solution

The fourth proportional to 21,788.29, 30,065.36 and 12,226.20 is: 16,870.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,788.29 : 30,065.36 = 12,226.20 : x
  2. Step 2: Convert to fraction form
    21,788.29/30,065.36 = 12,226.20/x
  3. Step 3: Cross multiply
    21,788.29x = 30,065.36 × 12,226.20
  4. Step 4: Simplify right side
    21,788.29x = 367,585,262.30
  5. Step 5: Solve for x
    x = 367,585,262.30/21,788.29
  6. Step 6: Final answer
    x = 16,870.77

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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.