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Finding the Fourth Proportional to 18,804.66, 28,191.27 and 7,719.30

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Solution

The fourth proportional to 18,804.66, 28,191.27 and 7,719.30 is: 11,572.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,804.66 : 28,191.27 = 7,719.30 : x
  2. Step 2: Convert to fraction form
    18,804.66/28,191.27 = 7,719.30/x
  3. Step 3: Cross multiply
    18,804.66x = 28,191.27 × 7,719.30
  4. Step 4: Simplify right side
    18,804.66x = 217,616,834.33
  5. Step 5: Solve for x
    x = 217,616,834.33/18,804.66
  6. Step 6: Final answer
    x = 11,572.50

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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.