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Finding the Fourth Proportional to 15,152.76, 20,917.26 and 10,187.64

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Solution

The fourth proportional to 15,152.76, 20,917.26 and 10,187.64 is: 14,063.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,152.76 : 20,917.26 = 10,187.64 : x
  2. Step 2: Convert to fraction form
    15,152.76/20,917.26 = 10,187.64/x
  3. Step 3: Cross multiply
    15,152.76x = 20,917.26 × 10,187.64
  4. Step 4: Simplify right side
    15,152.76x = 213,097,514.67
  5. Step 5: Solve for x
    x = 213,097,514.67/15,152.76
  6. Step 6: Final answer
    x = 14,063.28

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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.