Home / 20,613.51-28,446.52-11,181.87

Finding the Fourth Proportional to 20,613.51, 28,446.52 and 11,181.87

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Solution

The fourth proportional to 20,613.51, 28,446.52 and 11,181.87 is: 15,430.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,613.51 : 28,446.52 = 11,181.87 : x
  2. Step 2: Convert to fraction form
    20,613.51/28,446.52 = 11,181.87/x
  3. Step 3: Cross multiply
    20,613.51x = 28,446.52 × 11,181.87
  4. Step 4: Simplify right side
    20,613.51x = 318,085,288.59
  5. Step 5: Solve for x
    x = 318,085,288.59/20,613.51
  6. Step 6: Final answer
    x = 15,430.91

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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.