Home / 21,717.74-29,971.93-12,158.48

Finding the Fourth Proportional to 21,717.74, 29,971.93 and 12,158.48

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Solution

The fourth proportional to 21,717.74, 29,971.93 and 12,158.48 is: 16,779.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,717.74 : 29,971.93 = 12,158.48 : x
  2. Step 2: Convert to fraction form
    21,717.74/29,971.93 = 12,158.48/x
  3. Step 3: Cross multiply
    21,717.74x = 29,971.93 × 12,158.48
  4. Step 4: Simplify right side
    21,717.74x = 364,413,111.47
  5. Step 5: Solve for x
    x = 364,413,111.47/21,717.74
  6. Step 6: Final answer
    x = 16,779.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.