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Finding the Fourth Proportional to 15,162.54, 20,900.07 and 10,116.78

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Solution

The fourth proportional to 15,162.54, 20,900.07 and 10,116.78 is: 13,944.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,162.54 : 20,900.07 = 10,116.78 : x
  2. Step 2: Convert to fraction form
    15,162.54/20,900.07 = 10,116.78/x
  3. Step 3: Cross multiply
    15,162.54x = 20,900.07 × 10,116.78
  4. Step 4: Simplify right side
    15,162.54x = 211,441,410.17
  5. Step 5: Solve for x
    x = 211,441,410.17/15,162.54
  6. Step 6: Final answer
    x = 13,944.99

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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.