Home / 21,988.50-30,343.86-11,916.96

Finding the Fourth Proportional to 21,988.50, 30,343.86 and 11,916.96

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Solution

The fourth proportional to 21,988.50, 30,343.86 and 11,916.96 is: 16,445.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,988.50 : 30,343.86 = 11,916.96 : x
  2. Step 2: Convert to fraction form
    21,988.50/30,343.86 = 11,916.96/x
  3. Step 3: Cross multiply
    21,988.50x = 30,343.86 × 11,916.96
  4. Step 4: Simplify right side
    21,988.50x = 361,606,565.87
  5. Step 5: Solve for x
    x = 361,606,565.87/21,988.50
  6. Step 6: Final answer
    x = 16,445.26

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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.