Home / 20,938.72-31,409.16-5,356.48

Finding the Fourth Proportional to 20,938.72, 31,409.16 and 5,356.48

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Solution

The fourth proportional to 20,938.72, 31,409.16 and 5,356.48 is: 8,035.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.72 : 31,409.16 = 5,356.48 : x
  2. Step 2: Convert to fraction form
    20,938.72/31,409.16 = 5,356.48/x
  3. Step 3: Cross multiply
    20,938.72x = 31,409.16 × 5,356.48
  4. Step 4: Simplify right side
    20,938.72x = 168,242,537.36
  5. Step 5: Solve for x
    x = 168,242,537.36/20,938.72
  6. Step 6: Final answer
    x = 8,035.00

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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.