Home / 21,165.16-31,719.88-11,809.58

Finding the Fourth Proportional to 21,165.16, 31,719.88 and 11,809.58

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Solution

The fourth proportional to 21,165.16, 31,719.88 and 11,809.58 is: 17,698.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,165.16 : 31,719.88 = 11,809.58 : x
  2. Step 2: Convert to fraction form
    21,165.16/31,719.88 = 11,809.58/x
  3. Step 3: Cross multiply
    21,165.16x = 31,719.88 × 11,809.58
  4. Step 4: Simplify right side
    21,165.16x = 374,598,460.45
  5. Step 5: Solve for x
    x = 374,598,460.45/21,165.16
  6. Step 6: Final answer
    x = 17,698.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.