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Finding the Fourth Proportional to 15,151.08, 20,907 and 8,436.45

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Solution

The fourth proportional to 15,151.08, 20,907 and 8,436.45 is: 11,641.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,151.08 : 20,907 = 8,436.45 : x
  2. Step 2: Convert to fraction form
    15,151.08/20,907 = 8,436.45/x
  3. Step 3: Cross multiply
    15,151.08x = 20,907 × 8,436.45
  4. Step 4: Simplify right side
    15,151.08x = 176,380,860.15
  5. Step 5: Solve for x
    x = 176,380,860.15/15,151.08
  6. Step 6: Final answer
    x = 11,641.47

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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.