Home / 20,324.81-28,046.70-11,370.66

Finding the Fourth Proportional to 20,324.81, 28,046.70 and 11,370.66

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Solution

The fourth proportional to 20,324.81, 28,046.70 and 11,370.66 is: 15,690.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,324.81 : 28,046.70 = 11,370.66 : x
  2. Step 2: Convert to fraction form
    20,324.81/28,046.70 = 11,370.66/x
  3. Step 3: Cross multiply
    20,324.81x = 28,046.70 × 11,370.66
  4. Step 4: Simplify right side
    20,324.81x = 318,909,489.82
  5. Step 5: Solve for x
    x = 318,909,489.82/20,324.81
  6. Step 6: Final answer
    x = 15,690.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.