Home / 20,961.17-28,913.76-12,896.19

Finding the Fourth Proportional to 20,961.17, 28,913.76 and 12,896.19

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Solution

The fourth proportional to 20,961.17, 28,913.76 and 12,896.19 is: 17,788.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.17 : 28,913.76 = 12,896.19 : x
  2. Step 2: Convert to fraction form
    20,961.17/28,913.76 = 12,896.19/x
  3. Step 3: Cross multiply
    20,961.17x = 28,913.76 × 12,896.19
  4. Step 4: Simplify right side
    20,961.17x = 372,877,342.57
  5. Step 5: Solve for x
    x = 372,877,342.57/20,961.17
  6. Step 6: Final answer
    x = 17,788.96

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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.