Home / 21,314.79-31,981.40-11,442.54

Finding the Fourth Proportional to 21,314.79, 31,981.40 and 11,442.54

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Solution

The fourth proportional to 21,314.79, 31,981.40 and 11,442.54 is: 17,168.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,314.79 : 31,981.40 = 11,442.54 : x
  2. Step 2: Convert to fraction form
    21,314.79/31,981.40 = 11,442.54/x
  3. Step 3: Cross multiply
    21,314.79x = 31,981.40 × 11,442.54
  4. Step 4: Simplify right side
    21,314.79x = 365,948,448.76
  5. Step 5: Solve for x
    x = 365,948,448.76/21,314.79
  6. Step 6: Final answer
    x = 17,168.76

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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.