Home / 20,864.08-31,296.12-5,281.68

Finding the Fourth Proportional to 20,864.08, 31,296.12 and 5,281.68

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Solution

The fourth proportional to 20,864.08, 31,296.12 and 5,281.68 is: 7,922.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,864.08 : 31,296.12 = 5,281.68 : x
  2. Step 2: Convert to fraction form
    20,864.08/31,296.12 = 5,281.68/x
  3. Step 3: Cross multiply
    20,864.08x = 31,296.12 × 5,281.68
  4. Step 4: Simplify right side
    20,864.08x = 165,296,091.08
  5. Step 5: Solve for x
    x = 165,296,091.08/20,864.08
  6. Step 6: Final answer
    x = 7,922.52

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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.