Home / 20,716.86-31,004.10-12,816.30

Finding the Fourth Proportional to 20,716.86, 31,004.10 and 12,816.30

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Solution

The fourth proportional to 20,716.86, 31,004.10 and 12,816.30 is: 19,180.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.86 : 31,004.10 = 12,816.30 : x
  2. Step 2: Convert to fraction form
    20,716.86/31,004.10 = 12,816.30/x
  3. Step 3: Cross multiply
    20,716.86x = 31,004.10 × 12,816.30
  4. Step 4: Simplify right side
    20,716.86x = 397,357,846.83
  5. Step 5: Solve for x
    x = 397,357,846.83/20,716.86
  6. Step 6: Final answer
    x = 19,180.41

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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.