Home / 21,187.48-31,758.54-13,398.52

Finding the Fourth Proportional to 21,187.48, 31,758.54 and 13,398.52

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Solution

The fourth proportional to 21,187.48, 31,758.54 and 13,398.52 is: 20,083.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.48 : 31,758.54 = 13,398.52 : x
  2. Step 2: Convert to fraction form
    21,187.48/31,758.54 = 13,398.52/x
  3. Step 3: Cross multiply
    21,187.48x = 31,758.54 × 13,398.52
  4. Step 4: Simplify right side
    21,187.48x = 425,517,433.36
  5. Step 5: Solve for x
    x = 425,517,433.36/21,187.48
  6. Step 6: Final answer
    x = 20,083.44

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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.