Home / 21,816-30,106.14-12,386.04

Finding the Fourth Proportional to 21,816, 30,106.14 and 12,386.04

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Solution

The fourth proportional to 21,816, 30,106.14 and 12,386.04 is: 17,092.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,816 : 30,106.14 = 12,386.04 : x
  2. Step 2: Convert to fraction form
    21,816/30,106.14 = 12,386.04/x
  3. Step 3: Cross multiply
    21,816x = 30,106.14 × 12,386.04
  4. Step 4: Simplify right side
    21,816x = 372,895,854.29
  5. Step 5: Solve for x
    x = 372,895,854.29/21,816
  6. Step 6: Final answer
    x = 17,092.77

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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.