Home / 20,789.10-28,689.63-11,358.27

Finding the Fourth Proportional to 20,789.10, 28,689.63 and 11,358.27

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Solution

The fourth proportional to 20,789.10, 28,689.63 and 11,358.27 is: 15,674.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.10 : 28,689.63 = 11,358.27 : x
  2. Step 2: Convert to fraction form
    20,789.10/28,689.63 = 11,358.27/x
  3. Step 3: Cross multiply
    20,789.10x = 28,689.63 × 11,358.27
  4. Step 4: Simplify right side
    20,789.10x = 325,864,563.74
  5. Step 5: Solve for x
    x = 325,864,563.74/20,789.10
  6. Step 6: Final answer
    x = 15,674.78

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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.