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Finding the Fourth Proportional to 10,086.64, 15,129.88 and 3,930.64

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Solution

The fourth proportional to 10,086.64, 15,129.88 and 3,930.64 is: 5,895.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,086.64 : 15,129.88 = 3,930.64 : x
  2. Step 2: Convert to fraction form
    10,086.64/15,129.88 = 3,930.64/x
  3. Step 3: Cross multiply
    10,086.64x = 15,129.88 × 3,930.64
  4. Step 4: Simplify right side
    10,086.64x = 59,470,111.52
  5. Step 5: Solve for x
    x = 59,470,111.52/10,086.64
  6. Step 6: Final answer
    x = 5,895.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.