Home / 21,307.89-31,961.81-5,725.52

Finding the Fourth Proportional to 21,307.89, 31,961.81 and 5,725.52

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Solution

The fourth proportional to 21,307.89, 31,961.81 and 5,725.52 is: 8,588.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,307.89 : 31,961.81 = 5,725.52 : x
  2. Step 2: Convert to fraction form
    21,307.89/31,961.81 = 5,725.52/x
  3. Step 3: Cross multiply
    21,307.89x = 31,961.81 × 5,725.52
  4. Step 4: Simplify right side
    21,307.89x = 182,997,982.39
  5. Step 5: Solve for x
    x = 182,997,982.39/21,307.89
  6. Step 6: Final answer
    x = 8,588.27

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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.