Home / 20,884.68-31,328.28-8,404.65

Finding the Fourth Proportional to 20,884.68, 31,328.28 and 8,404.65

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Solution

The fourth proportional to 20,884.68, 31,328.28 and 8,404.65 is: 12,607.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,884.68 : 31,328.28 = 8,404.65 : x
  2. Step 2: Convert to fraction form
    20,884.68/31,328.28 = 8,404.65/x
  3. Step 3: Cross multiply
    20,884.68x = 31,328.28 × 8,404.65
  4. Step 4: Simplify right side
    20,884.68x = 263,303,228.50
  5. Step 5: Solve for x
    x = 263,303,228.50/20,884.68
  6. Step 6: Final answer
    x = 12,607.48

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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.