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Finding the Fourth Proportional to 7,908.10, 11,856.15 and 4,015.30

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Solution

The fourth proportional to 7,908.10, 11,856.15 and 4,015.30 is: 6,019.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,908.10 : 11,856.15 = 4,015.30 : x
  2. Step 2: Convert to fraction form
    7,908.10/11,856.15 = 4,015.30/x
  3. Step 3: Cross multiply
    7,908.10x = 11,856.15 × 4,015.30
  4. Step 4: Simplify right side
    7,908.10x = 47,605,999.10
  5. Step 5: Solve for x
    x = 47,605,999.10/7,908.10
  6. Step 6: Final answer
    x = 6,019.90

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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.