Home / 20,816.62-31,235.18-9,721.69

Finding the Fourth Proportional to 20,816.62, 31,235.18 and 9,721.69

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Solution

The fourth proportional to 20,816.62, 31,235.18 and 9,721.69 is: 14,587.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.62 : 31,235.18 = 9,721.69 : x
  2. Step 2: Convert to fraction form
    20,816.62/31,235.18 = 9,721.69/x
  3. Step 3: Cross multiply
    20,816.62x = 31,235.18 × 9,721.69
  4. Step 4: Simplify right side
    20,816.62x = 303,658,737.05
  5. Step 5: Solve for x
    x = 303,658,737.05/20,816.62
  6. Step 6: Final answer
    x = 14,587.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.