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Finding the Fourth Proportional to 8,019.60, 11,055.86 and 6,912.32

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Solution

The fourth proportional to 8,019.60, 11,055.86 and 6,912.32 is: 9,529.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,019.60 : 11,055.86 = 6,912.32 : x
  2. Step 2: Convert to fraction form
    8,019.60/11,055.86 = 6,912.32/x
  3. Step 3: Cross multiply
    8,019.60x = 11,055.86 × 6,912.32
  4. Step 4: Simplify right side
    8,019.60x = 76,421,642.20
  5. Step 5: Solve for x
    x = 76,421,642.20/8,019.60
  6. Step 6: Final answer
    x = 9,529.36

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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.