Home / 21,904.77-30,228.66-13,288.09

Finding the Fourth Proportional to 21,904.77, 30,228.66 and 13,288.09

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Solution

The fourth proportional to 21,904.77, 30,228.66 and 13,288.09 is: 18,337.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,904.77 : 30,228.66 = 13,288.09 : x
  2. Step 2: Convert to fraction form
    21,904.77/30,228.66 = 13,288.09/x
  3. Step 3: Cross multiply
    21,904.77x = 30,228.66 × 13,288.09
  4. Step 4: Simplify right side
    21,904.77x = 401,681,154.66
  5. Step 5: Solve for x
    x = 401,681,154.66/21,904.77
  6. Step 6: Final answer
    x = 18,337.61

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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.