Home / 21,511.69-29,687.45-12,080.25

Finding the Fourth Proportional to 21,511.69, 29,687.45 and 12,080.25

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Solution

The fourth proportional to 21,511.69, 29,687.45 and 12,080.25 is: 16,671.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,511.69 : 29,687.45 = 12,080.25 : x
  2. Step 2: Convert to fraction form
    21,511.69/29,687.45 = 12,080.25/x
  3. Step 3: Cross multiply
    21,511.69x = 29,687.45 × 12,080.25
  4. Step 4: Simplify right side
    21,511.69x = 358,631,757.46
  5. Step 5: Solve for x
    x = 358,631,757.46/21,511.69
  6. Step 6: Final answer
    x = 16,671.48

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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.