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Finding the Fourth Proportional to 15,158.63, 20,918.07 and 8,352.42

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Solution

The fourth proportional to 15,158.63, 20,918.07 and 8,352.42 is: 11,525.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,158.63 : 20,918.07 = 8,352.42 : x
  2. Step 2: Convert to fraction form
    15,158.63/20,918.07 = 8,352.42/x
  3. Step 3: Cross multiply
    15,158.63x = 20,918.07 × 8,352.42
  4. Step 4: Simplify right side
    15,158.63x = 174,716,506.23
  5. Step 5: Solve for x
    x = 174,716,506.23/15,158.63
  6. Step 6: Final answer
    x = 11,525.88

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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.