Home / 20,864.88-31,222.80-18,123.84

Finding the Fourth Proportional to 20,864.88, 31,222.80 and 18,123.84

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Solution

The fourth proportional to 20,864.88, 31,222.80 and 18,123.84 is: 27,121.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,864.88 : 31,222.80 = 18,123.84 : x
  2. Step 2: Convert to fraction form
    20,864.88/31,222.80 = 18,123.84/x
  3. Step 3: Cross multiply
    20,864.88x = 31,222.80 × 18,123.84
  4. Step 4: Simplify right side
    20,864.88x = 565,877,031.55
  5. Step 5: Solve for x
    x = 565,877,031.55/20,864.88
  6. Step 6: Final answer
    x = 27,121.03

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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.