Home / 20,816.88-31,224.78-9,717.45

Finding the Fourth Proportional to 20,816.88, 31,224.78 and 9,717.45

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Solution

The fourth proportional to 20,816.88, 31,224.78 and 9,717.45 is: 14,575.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.88 : 31,224.78 = 9,717.45 : x
  2. Step 2: Convert to fraction form
    20,816.88/31,224.78 = 9,717.45/x
  3. Step 3: Cross multiply
    20,816.88x = 31,224.78 × 9,717.45
  4. Step 4: Simplify right side
    20,816.88x = 303,425,238.41
  5. Step 5: Solve for x
    x = 303,425,238.41/20,816.88
  6. Step 6: Final answer
    x = 14,575.92

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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.