Home / 21,129.52-31,683.56-7,084.64

Finding the Fourth Proportional to 21,129.52, 31,683.56 and 7,084.64

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Solution

The fourth proportional to 21,129.52, 31,683.56 and 7,084.64 is: 10,623.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,129.52 : 31,683.56 = 7,084.64 : x
  2. Step 2: Convert to fraction form
    21,129.52/31,683.56 = 7,084.64/x
  3. Step 3: Cross multiply
    21,129.52x = 31,683.56 × 7,084.64
  4. Step 4: Simplify right side
    21,129.52x = 224,466,616.52
  5. Step 5: Solve for x
    x = 224,466,616.52/21,129.52
  6. Step 6: Final answer
    x = 10,623.37

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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.