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Finding the Fourth Proportional to 20,950.60, 28,911.08 and 11,519.08

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Solution

The fourth proportional to 20,950.60, 28,911.08 and 11,519.08 is: 15,895.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,950.60 : 28,911.08 = 11,519.08 : x
  2. Step 2: Convert to fraction form
    20,950.60/28,911.08 = 11,519.08/x
  3. Step 3: Cross multiply
    20,950.60x = 28,911.08 × 11,519.08
  4. Step 4: Simplify right side
    20,950.60x = 333,029,043.41
  5. Step 5: Solve for x
    x = 333,029,043.41/20,950.60
  6. Step 6: Final answer
    x = 15,895.92

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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.