Home / 20,814.85-31,217.91-9,726.76

Finding the Fourth Proportional to 20,814.85, 31,217.91 and 9,726.76

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Solution

The fourth proportional to 20,814.85, 31,217.91 and 9,726.76 is: 14,588.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,814.85 : 31,217.91 = 9,726.76 : x
  2. Step 2: Convert to fraction form
    20,814.85/31,217.91 = 9,726.76/x
  3. Step 3: Cross multiply
    20,814.85x = 31,217.91 × 9,726.76
  4. Step 4: Simplify right side
    20,814.85x = 303,649,118.27
  5. Step 5: Solve for x
    x = 303,649,118.27/20,814.85
  6. Step 6: Final answer
    x = 14,588.10

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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.