Home / 15,115.64-20,861.27-9,150.60

Finding the Fourth Proportional to 15,115.64, 20,861.27 and 9,150.60

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Solution

The fourth proportional to 15,115.64, 20,861.27 and 9,150.60 is: 12,628.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,115.64 : 20,861.27 = 9,150.60 : x
  2. Step 2: Convert to fraction form
    15,115.64/20,861.27 = 9,150.60/x
  3. Step 3: Cross multiply
    15,115.64x = 20,861.27 × 9,150.60
  4. Step 4: Simplify right side
    15,115.64x = 190,893,053.77
  5. Step 5: Solve for x
    x = 190,893,053.77/15,115.64
  6. Step 6: Final answer
    x = 12,628.85

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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.