Home / 21,511.10-29,680.47-12,079.04

Finding the Fourth Proportional to 21,511.10, 29,680.47 and 12,079.04

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Solution

The fourth proportional to 21,511.10, 29,680.47 and 12,079.04 is: 16,666.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,511.10 : 29,680.47 = 12,079.04 : x
  2. Step 2: Convert to fraction form
    21,511.10/29,680.47 = 12,079.04/x
  3. Step 3: Cross multiply
    21,511.10x = 29,680.47 × 12,079.04
  4. Step 4: Simplify right side
    21,511.10x = 358,511,584.35
  5. Step 5: Solve for x
    x = 358,511,584.35/21,511.10
  6. Step 6: Final answer
    x = 16,666.35

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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.