Home / 21,322.36-31,981.08-5,738.76

Finding the Fourth Proportional to 21,322.36, 31,981.08 and 5,738.76

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Solution

The fourth proportional to 21,322.36, 31,981.08 and 5,738.76 is: 8,607.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,322.36 : 31,981.08 = 5,738.76 : x
  2. Step 2: Convert to fraction form
    21,322.36/31,981.08 = 5,738.76/x
  3. Step 3: Cross multiply
    21,322.36x = 31,981.08 × 5,738.76
  4. Step 4: Simplify right side
    21,322.36x = 183,531,742.66
  5. Step 5: Solve for x
    x = 183,531,742.66/21,322.36
  6. Step 6: Final answer
    x = 8,607.48

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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.