Home / 20,872.14-28,806.50-12,916.92

Finding the Fourth Proportional to 20,872.14, 28,806.50 and 12,916.92

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Solution

The fourth proportional to 20,872.14, 28,806.50 and 12,916.92 is: 17,827.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.14 : 28,806.50 = 12,916.92 : x
  2. Step 2: Convert to fraction form
    20,872.14/28,806.50 = 12,916.92/x
  3. Step 3: Cross multiply
    20,872.14x = 28,806.50 × 12,916.92
  4. Step 4: Simplify right side
    20,872.14x = 372,091,255.98
  5. Step 5: Solve for x
    x = 372,091,255.98/20,872.14
  6. Step 6: Final answer
    x = 17,827.17

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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.