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Finding the Fourth Proportional to 18,712.18, 28,043.96 and 7,605.93

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Solution

The fourth proportional to 18,712.18, 28,043.96 and 7,605.93 is: 11,399.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.18 : 28,043.96 = 7,605.93 : x
  2. Step 2: Convert to fraction form
    18,712.18/28,043.96 = 7,605.93/x
  3. Step 3: Cross multiply
    18,712.18x = 28,043.96 × 7,605.93
  4. Step 4: Simplify right side
    18,712.18x = 213,300,358.65
  5. Step 5: Solve for x
    x = 213,300,358.65/18,712.18
  6. Step 6: Final answer
    x = 11,399.01

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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.