Home / 21,511.35-29,680.47-12,553.74

Finding the Fourth Proportional to 21,511.35, 29,680.47 and 12,553.74

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Solution

The fourth proportional to 21,511.35, 29,680.47 and 12,553.74 is: 17,321.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,511.35 : 29,680.47 = 12,553.74 : x
  2. Step 2: Convert to fraction form
    21,511.35/29,680.47 = 12,553.74/x
  3. Step 3: Cross multiply
    21,511.35x = 29,680.47 × 12,553.74
  4. Step 4: Simplify right side
    21,511.35x = 372,600,903.46
  5. Step 5: Solve for x
    x = 372,600,903.46/21,511.35
  6. Step 6: Final answer
    x = 17,321.13

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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.