Home / 21,987.78-30,342.97-11,916.24

Finding the Fourth Proportional to 21,987.78, 30,342.97 and 11,916.24

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Solution

The fourth proportional to 21,987.78, 30,342.97 and 11,916.24 is: 16,444.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,987.78 : 30,342.97 = 11,916.24 : x
  2. Step 2: Convert to fraction form
    21,987.78/30,342.97 = 11,916.24/x
  3. Step 3: Cross multiply
    21,987.78x = 30,342.97 × 11,916.24
  4. Step 4: Simplify right side
    21,987.78x = 361,574,112.83
  5. Step 5: Solve for x
    x = 361,574,112.83/21,987.78
  6. Step 6: Final answer
    x = 16,444.32

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1.5x scale

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.