Home / 21,436.58-29,581.23-11,876.42

Finding the Fourth Proportional to 21,436.58, 29,581.23 and 11,876.42

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Solution

The fourth proportional to 21,436.58, 29,581.23 and 11,876.42 is: 16,388.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,436.58 : 29,581.23 = 11,876.42 : x
  2. Step 2: Convert to fraction form
    21,436.58/29,581.23 = 11,876.42/x
  3. Step 3: Cross multiply
    21,436.58x = 29,581.23 × 11,876.42
  4. Step 4: Simplify right side
    21,436.58x = 351,319,111.60
  5. Step 5: Solve for x
    x = 351,319,111.60/21,436.58
  6. Step 6: Final answer
    x = 16,388.77

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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.