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Finding the Fourth Proportional to 18,711.76, 28,067.62 and 9,477.76

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Solution

The fourth proportional to 18,711.76, 28,067.62 and 9,477.76 is: 14,216.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,711.76 : 28,067.62 = 9,477.76 : x
  2. Step 2: Convert to fraction form
    18,711.76/28,067.62 = 9,477.76/x
  3. Step 3: Cross multiply
    18,711.76x = 28,067.62 × 9,477.76
  4. Step 4: Simplify right side
    18,711.76x = 266,018,166.13
  5. Step 5: Solve for x
    x = 266,018,166.13/18,711.76
  6. Step 6: Final answer
    x = 14,216.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.