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Finding the Fourth Proportional to 18,931.19, 28,407.03 and 7,093.02

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Solution

The fourth proportional to 18,931.19, 28,407.03 and 7,093.02 is: 10,643.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,931.19 : 28,407.03 = 7,093.02 : x
  2. Step 2: Convert to fraction form
    18,931.19/28,407.03 = 7,093.02/x
  3. Step 3: Cross multiply
    18,931.19x = 28,407.03 × 7,093.02
  4. Step 4: Simplify right side
    18,931.19x = 201,491,631.93
  5. Step 5: Solve for x
    x = 201,491,631.93/18,931.19
  6. Step 6: Final answer
    x = 10,643.37

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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.