Home / 20,924.80-31,322.40-12,133.60

Finding the Fourth Proportional to 20,924.80, 31,322.40 and 12,133.60

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Solution

The fourth proportional to 20,924.80, 31,322.40 and 12,133.60 is: 18,162.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,924.80 : 31,322.40 = 12,133.60 : x
  2. Step 2: Convert to fraction form
    20,924.80/31,322.40 = 12,133.60/x
  3. Step 3: Cross multiply
    20,924.80x = 31,322.40 × 12,133.60
  4. Step 4: Simplify right side
    20,924.80x = 380,053,472.64
  5. Step 5: Solve for x
    x = 380,053,472.64/20,924.80
  6. Step 6: Final answer
    x = 18,162.82

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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.