Home / 21,988.24-30,343.74-11,916.50

Finding the Fourth Proportional to 21,988.24, 30,343.74 and 11,916.50

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Solution

The fourth proportional to 21,988.24, 30,343.74 and 11,916.50 is: 16,444.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,988.24 : 30,343.74 = 11,916.50 : x
  2. Step 2: Convert to fraction form
    21,988.24/30,343.74 = 11,916.50/x
  3. Step 3: Cross multiply
    21,988.24x = 30,343.74 × 11,916.50
  4. Step 4: Simplify right side
    21,988.24x = 361,591,177.71
  5. Step 5: Solve for x
    x = 361,591,177.71/21,988.24
  6. Step 6: Final answer
    x = 16,444.75

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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.