Home / 21,188.81-31,784.74-5,606.25

Finding the Fourth Proportional to 21,188.81, 31,784.74 and 5,606.25

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Solution

The fourth proportional to 21,188.81, 31,784.74 and 5,606.25 is: 8,409.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,188.81 : 31,784.74 = 5,606.25 : x
  2. Step 2: Convert to fraction form
    21,188.81/31,784.74 = 5,606.25/x
  3. Step 3: Cross multiply
    21,188.81x = 31,784.74 × 5,606.25
  4. Step 4: Simplify right side
    21,188.81x = 178,193,170.59
  5. Step 5: Solve for x
    x = 178,193,170.59/21,188.81
  6. Step 6: Final answer
    x = 8,409.78

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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.