Home / 15,146.32-20,902.08-8,431.60

Finding the Fourth Proportional to 15,146.32, 20,902.08 and 8,431.60

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Solution

The fourth proportional to 15,146.32, 20,902.08 and 8,431.60 is: 11,635.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,146.32 : 20,902.08 = 8,431.60 : x
  2. Step 2: Convert to fraction form
    15,146.32/20,902.08 = 8,431.60/x
  3. Step 3: Cross multiply
    15,146.32x = 20,902.08 × 8,431.60
  4. Step 4: Simplify right side
    15,146.32x = 176,237,977.73
  5. Step 5: Solve for x
    x = 176,237,977.73/15,146.32
  6. Step 6: Final answer
    x = 11,635.70

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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.