Home / 20,916.50-28,864.80-11,964.06

Finding the Fourth Proportional to 20,916.50, 28,864.80 and 11,964.06

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Solution

The fourth proportional to 20,916.50, 28,864.80 and 11,964.06 is: 16,510.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,916.50 : 28,864.80 = 11,964.06 : x
  2. Step 2: Convert to fraction form
    20,916.50/28,864.80 = 11,964.06/x
  3. Step 3: Cross multiply
    20,916.50x = 28,864.80 × 11,964.06
  4. Step 4: Simplify right side
    20,916.50x = 345,340,199.09
  5. Step 5: Solve for x
    x = 345,340,199.09/20,916.50
  6. Step 6: Final answer
    x = 16,510.42

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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.