Home / 21,137.60-31,755.36-13,264.64

Finding the Fourth Proportional to 21,137.60, 31,755.36 and 13,264.64

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Solution

The fourth proportional to 21,137.60, 31,755.36 and 13,264.64 is: 19,927.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,137.60 : 31,755.36 = 13,264.64 : x
  2. Step 2: Convert to fraction form
    21,137.60/31,755.36 = 13,264.64/x
  3. Step 3: Cross multiply
    21,137.60x = 31,755.36 × 13,264.64
  4. Step 4: Simplify right side
    21,137.60x = 421,223,418.47
  5. Step 5: Solve for x
    x = 421,223,418.47/21,137.60
  6. Step 6: Final answer
    x = 19,927.68

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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.