Home / 21,291.12-31,908.38-11,293.81

Finding the Fourth Proportional to 21,291.12, 31,908.38 and 11,293.81

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Solution

The fourth proportional to 21,291.12, 31,908.38 and 11,293.81 is: 16,925.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,291.12 : 31,908.38 = 11,293.81 : x
  2. Step 2: Convert to fraction form
    21,291.12/31,908.38 = 11,293.81/x
  3. Step 3: Cross multiply
    21,291.12x = 31,908.38 × 11,293.81
  4. Step 4: Simplify right side
    21,291.12x = 360,367,181.13
  5. Step 5: Solve for x
    x = 360,367,181.13/21,291.12
  6. Step 6: Final answer
    x = 16,925.70

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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.