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Finding the Fourth Proportional to 20,764.88, 28,658.28 and 11,810.66

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Solution

The fourth proportional to 20,764.88, 28,658.28 and 11,810.66 is: 16,300.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,764.88 : 28,658.28 = 11,810.66 : x
  2. Step 2: Convert to fraction form
    20,764.88/28,658.28 = 11,810.66/x
  3. Step 3: Cross multiply
    20,764.88x = 28,658.28 × 11,810.66
  4. Step 4: Simplify right side
    20,764.88x = 338,472,998.92
  5. Step 5: Solve for x
    x = 338,472,998.92/20,764.88
  6. Step 6: Final answer
    x = 16,300.26

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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.