Home / 10,129.28-15,188.16-4,928.64

Finding the Fourth Proportional to 10,129.28, 15,188.16 and 4,928.64

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Solution

The fourth proportional to 10,129.28, 15,188.16 and 4,928.64 is: 7,390.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,129.28 : 15,188.16 = 4,928.64 : x
  2. Step 2: Convert to fraction form
    10,129.28/15,188.16 = 4,928.64/x
  3. Step 3: Cross multiply
    10,129.28x = 15,188.16 × 4,928.64
  4. Step 4: Simplify right side
    10,129.28x = 74,856,972.90
  5. Step 5: Solve for x
    x = 74,856,972.90/10,129.28
  6. Step 6: Final answer
    x = 7,390.16

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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.