Home / 20,789.54-28,689.59-11,358.11

Finding the Fourth Proportional to 20,789.54, 28,689.59 and 11,358.11

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Solution

The fourth proportional to 20,789.54, 28,689.59 and 11,358.11 is: 15,674.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.54 : 28,689.59 = 11,358.11 : x
  2. Step 2: Convert to fraction form
    20,789.54/28,689.59 = 11,358.11/x
  3. Step 3: Cross multiply
    20,789.54x = 28,689.59 × 11,358.11
  4. Step 4: Simplify right side
    20,789.54x = 325,859,457.82
  5. Step 5: Solve for x
    x = 325,859,457.82/20,789.54
  6. Step 6: Final answer
    x = 15,674.20

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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.