Home / 20,789.19-28,687.74-11,357.76

Finding the Fourth Proportional to 20,789.19, 28,687.74 and 11,357.76

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Solution

The fourth proportional to 20,789.19, 28,687.74 and 11,357.76 is: 15,672.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.19 : 28,687.74 = 11,357.76 : x
  2. Step 2: Convert to fraction form
    20,789.19/28,687.74 = 11,357.76/x
  3. Step 3: Cross multiply
    20,789.19x = 28,687.74 × 11,357.76
  4. Step 4: Simplify right side
    20,789.19x = 325,828,465.86
  5. Step 5: Solve for x
    x = 325,828,465.86/20,789.19
  6. Step 6: Final answer
    x = 15,672.98

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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.