Home / 20,789.98-28,690.56-11,358.34

Finding the Fourth Proportional to 20,789.98, 28,690.56 and 11,358.34

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Solution

The fourth proportional to 20,789.98, 28,690.56 and 11,358.34 is: 15,674.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.98 : 28,690.56 = 11,358.34 : x
  2. Step 2: Convert to fraction form
    20,789.98/28,690.56 = 11,358.34/x
  3. Step 3: Cross multiply
    20,789.98x = 28,690.56 × 11,358.34
  4. Step 4: Simplify right side
    20,789.98x = 325,877,135.27
  5. Step 5: Solve for x
    x = 325,877,135.27/20,789.98
  6. Step 6: Final answer
    x = 15,674.72

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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.