Home / 20,816.94-31,230.01-9,717.57

Finding the Fourth Proportional to 20,816.94, 31,230.01 and 9,717.57

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Solution

The fourth proportional to 20,816.94, 31,230.01 and 9,717.57 is: 14,578.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.94 : 31,230.01 = 9,717.57 : x
  2. Step 2: Convert to fraction form
    20,816.94/31,230.01 = 9,717.57/x
  3. Step 3: Cross multiply
    20,816.94x = 31,230.01 × 9,717.57
  4. Step 4: Simplify right side
    20,816.94x = 303,479,808.28
  5. Step 5: Solve for x
    x = 303,479,808.28/20,816.94
  6. Step 6: Final answer
    x = 14,578.50

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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.