Home / 20,789.76-28,690.29-11,358.93

Finding the Fourth Proportional to 20,789.76, 28,690.29 and 11,358.93

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Solution

The fourth proportional to 20,789.76, 28,690.29 and 11,358.93 is: 15,675.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.76 : 28,690.29 = 11,358.93 : x
  2. Step 2: Convert to fraction form
    20,789.76/28,690.29 = 11,358.93/x
  3. Step 3: Cross multiply
    20,789.76x = 28,690.29 × 11,358.93
  4. Step 4: Simplify right side
    20,789.76x = 325,890,995.79
  5. Step 5: Solve for x
    x = 325,890,995.79/20,789.76
  6. Step 6: Final answer
    x = 15,675.55

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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.