Home / 20,528.43-28,328.67-11,575.86

Finding the Fourth Proportional to 20,528.43, 28,328.67 and 11,575.86

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Solution

The fourth proportional to 20,528.43, 28,328.67 and 11,575.86 is: 15,974.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,528.43 : 28,328.67 = 11,575.86 : x
  2. Step 2: Convert to fraction form
    20,528.43/28,328.67 = 11,575.86/x
  3. Step 3: Cross multiply
    20,528.43x = 28,328.67 × 11,575.86
  4. Step 4: Simplify right side
    20,528.43x = 327,928,717.91
  5. Step 5: Solve for x
    x = 327,928,717.91/20,528.43
  6. Step 6: Final answer
    x = 15,974.37

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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.