Home / 21,988.01-30,343.82-11,916.77

Finding the Fourth Proportional to 21,988.01, 30,343.82 and 11,916.77

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Solution

The fourth proportional to 21,988.01, 30,343.82 and 11,916.77 is: 16,445.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,988.01 : 30,343.82 = 11,916.77 : x
  2. Step 2: Convert to fraction form
    21,988.01/30,343.82 = 11,916.77/x
  3. Step 3: Cross multiply
    21,988.01x = 30,343.82 × 11,916.77
  4. Step 4: Simplify right side
    21,988.01x = 361,600,283.24
  5. Step 5: Solve for x
    x = 361,600,283.24/21,988.01
  6. Step 6: Final answer
    x = 16,445.34

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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.