Home / 21,308.15-31,962.22-5,725.78

Finding the Fourth Proportional to 21,308.15, 31,962.22 and 5,725.78

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Solution

The fourth proportional to 21,308.15, 31,962.22 and 5,725.78 is: 8,588.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,308.15 : 31,962.22 = 5,725.78 : x
  2. Step 2: Convert to fraction form
    21,308.15/31,962.22 = 5,725.78/x
  3. Step 3: Cross multiply
    21,308.15x = 31,962.22 × 5,725.78
  4. Step 4: Simplify right side
    21,308.15x = 183,008,545.81
  5. Step 5: Solve for x
    x = 183,008,545.81/21,308.15
  6. Step 6: Final answer
    x = 8,588.66

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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.