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Finding the Fourth Proportional to 15,158.99, 20,918.86 and 8,444.25

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Solution

The fourth proportional to 15,158.99, 20,918.86 and 8,444.25 is: 11,652.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,158.99 : 20,918.86 = 8,444.25 : x
  2. Step 2: Convert to fraction form
    15,158.99/20,918.86 = 8,444.25/x
  3. Step 3: Cross multiply
    15,158.99x = 20,918.86 × 8,444.25
  4. Step 4: Simplify right side
    15,158.99x = 176,644,083.56
  5. Step 5: Solve for x
    x = 176,644,083.56/15,158.99
  6. Step 6: Final answer
    x = 11,652.76

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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.