Home / 21,011.19-28,994.13-11,579.82

Finding the Fourth Proportional to 21,011.19, 28,994.13 and 11,579.82

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Solution

The fourth proportional to 21,011.19, 28,994.13 and 11,579.82 is: 15,979.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.19 : 28,994.13 = 11,579.82 : x
  2. Step 2: Convert to fraction form
    21,011.19/28,994.13 = 11,579.82/x
  3. Step 3: Cross multiply
    21,011.19x = 28,994.13 × 11,579.82
  4. Step 4: Simplify right side
    21,011.19x = 335,746,806.46
  5. Step 5: Solve for x
    x = 335,746,806.46/21,011.19
  6. Step 6: Final answer
    x = 15,979.43

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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.