Home / 21,131.42-31,711.50-11,277.77

Finding the Fourth Proportional to 21,131.42, 31,711.50 and 11,277.77

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Solution

The fourth proportional to 21,131.42, 31,711.50 and 11,277.77 is: 16,924.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131.42 : 31,711.50 = 11,277.77 : x
  2. Step 2: Convert to fraction form
    21,131.42/31,711.50 = 11,277.77/x
  3. Step 3: Cross multiply
    21,131.42x = 31,711.50 × 11,277.77
  4. Step 4: Simplify right side
    21,131.42x = 357,634,844.80
  5. Step 5: Solve for x
    x = 357,634,844.80/21,131.42
  6. Step 6: Final answer
    x = 16,924.32

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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.