Home / 21,512.69-29,688.83-12,081.25

Finding the Fourth Proportional to 21,512.69, 29,688.83 and 12,081.25

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Solution

The fourth proportional to 21,512.69, 29,688.83 and 12,081.25 is: 16,672.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,512.69 : 29,688.83 = 12,081.25 : x
  2. Step 2: Convert to fraction form
    21,512.69/29,688.83 = 12,081.25/x
  3. Step 3: Cross multiply
    21,512.69x = 29,688.83 × 12,081.25
  4. Step 4: Simplify right side
    21,512.69x = 358,678,177.44
  5. Step 5: Solve for x
    x = 358,678,177.44/21,512.69
  6. Step 6: Final answer
    x = 16,672.87

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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.