Home / 21,508.10-29,680.58-11,947.68

Finding the Fourth Proportional to 21,508.10, 29,680.58 and 11,947.68

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Solution

The fourth proportional to 21,508.10, 29,680.58 and 11,947.68 is: 16,487.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,508.10 : 29,680.58 = 11,947.68 : x
  2. Step 2: Convert to fraction form
    21,508.10/29,680.58 = 11,947.68/x
  3. Step 3: Cross multiply
    21,508.10x = 29,680.58 × 11,947.68
  4. Step 4: Simplify right side
    21,508.10x = 354,614,072.05
  5. Step 5: Solve for x
    x = 354,614,072.05/21,508.10
  6. Step 6: Final answer
    x = 16,487.47

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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.