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Finding the Fourth Proportional to 15,152.10, 20,910.60 and 8,437.80

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Solution

The fourth proportional to 15,152.10, 20,910.60 and 8,437.80 is: 11,644.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,152.10 : 20,910.60 = 8,437.80 : x
  2. Step 2: Convert to fraction form
    15,152.10/20,910.60 = 8,437.80/x
  3. Step 3: Cross multiply
    15,152.10x = 20,910.60 × 8,437.80
  4. Step 4: Simplify right side
    15,152.10x = 176,439,460.68
  5. Step 5: Solve for x
    x = 176,439,460.68/15,152.10
  6. Step 6: Final answer
    x = 11,644.55

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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.