Home / 21,987.62-30,342.68-11,916.08

Finding the Fourth Proportional to 21,987.62, 30,342.68 and 11,916.08

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Solution

The fourth proportional to 21,987.62, 30,342.68 and 11,916.08 is: 16,444.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,987.62 : 30,342.68 = 11,916.08 : x
  2. Step 2: Convert to fraction form
    21,987.62/30,342.68 = 11,916.08/x
  3. Step 3: Cross multiply
    21,987.62x = 30,342.68 × 11,916.08
  4. Step 4: Simplify right side
    21,987.62x = 361,565,802.29
  5. Step 5: Solve for x
    x = 361,565,802.29/21,987.62
  6. Step 6: Final answer
    x = 16,444.06

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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.