Home / 20,855.28-31,283.10-5,272.92

Finding the Fourth Proportional to 20,855.28, 31,283.10 and 5,272.92

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Solution

The fourth proportional to 20,855.28, 31,283.10 and 5,272.92 is: 7,909.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,855.28 : 31,283.10 = 5,272.92 : x
  2. Step 2: Convert to fraction form
    20,855.28/31,283.10 = 5,272.92/x
  3. Step 3: Cross multiply
    20,855.28x = 31,283.10 × 5,272.92
  4. Step 4: Simplify right side
    20,855.28x = 164,953,283.65
  5. Step 5: Solve for x
    x = 164,953,283.65/20,855.28
  6. Step 6: Final answer
    x = 7,909.43

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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.