Home / 21,178.80-29,226.99-13,225.65

Finding the Fourth Proportional to 21,178.80, 29,226.99 and 13,225.65

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Solution

The fourth proportional to 21,178.80, 29,226.99 and 13,225.65 is: 18,251.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178.80 : 29,226.99 = 13,225.65 : x
  2. Step 2: Convert to fraction form
    21,178.80/29,226.99 = 13,225.65/x
  3. Step 3: Cross multiply
    21,178.80x = 29,226.99 × 13,225.65
  4. Step 4: Simplify right side
    21,178.80x = 386,545,940.29
  5. Step 5: Solve for x
    x = 386,545,940.29/21,178.80
  6. Step 6: Final answer
    x = 18,251.55

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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.