Home / 20,916.08-28,864.11-11,963.57

Finding the Fourth Proportional to 20,916.08, 28,864.11 and 11,963.57

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Solution

The fourth proportional to 20,916.08, 28,864.11 and 11,963.57 is: 16,509.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,916.08 : 28,864.11 = 11,963.57 : x
  2. Step 2: Convert to fraction form
    20,916.08/28,864.11 = 11,963.57/x
  3. Step 3: Cross multiply
    20,916.08x = 28,864.11 × 11,963.57
  4. Step 4: Simplify right side
    20,916.08x = 345,317,872.63
  5. Step 5: Solve for x
    x = 345,317,872.63/20,916.08
  6. Step 6: Final answer
    x = 16,509.68

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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.