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Finding the Fourth Proportional to 18,953.11, 28,409.67 and 7,099.15

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Solution

The fourth proportional to 18,953.11, 28,409.67 and 7,099.15 is: 10,641.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,953.11 : 28,409.67 = 7,099.15 : x
  2. Step 2: Convert to fraction form
    18,953.11/28,409.67 = 7,099.15/x
  3. Step 3: Cross multiply
    18,953.11x = 28,409.67 × 7,099.15
  4. Step 4: Simplify right side
    18,953.11x = 201,684,464.38
  5. Step 5: Solve for x
    x = 201,684,464.38/18,953.11
  6. Step 6: Final answer
    x = 10,641.23

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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.