Home / 20,916.32-28,864.62-11,964.20

Finding the Fourth Proportional to 20,916.32, 28,864.62 and 11,964.20

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Solution

The fourth proportional to 20,916.32, 28,864.62 and 11,964.20 is: 16,510.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,916.32 : 28,864.62 = 11,964.20 : x
  2. Step 2: Convert to fraction form
    20,916.32/28,864.62 = 11,964.20/x
  3. Step 3: Cross multiply
    20,916.32x = 28,864.62 × 11,964.20
  4. Step 4: Simplify right side
    20,916.32x = 345,341,942.28
  5. Step 5: Solve for x
    x = 345,341,942.28/20,916.32
  6. Step 6: Final answer
    x = 16,510.65

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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.