Home / 8,712.75-12,015.45-6,720.15

Finding the Fourth Proportional to 8,712.75, 12,015.45 and 6,720.15

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Solution

The fourth proportional to 8,712.75, 12,015.45 and 6,720.15 is: 9,267.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,712.75 : 12,015.45 = 6,720.15 : x
  2. Step 2: Convert to fraction form
    8,712.75/12,015.45 = 6,720.15/x
  3. Step 3: Cross multiply
    8,712.75x = 12,015.45 × 6,720.15
  4. Step 4: Simplify right side
    8,712.75x = 80,745,626.32
  5. Step 5: Solve for x
    x = 80,745,626.32/8,712.75
  6. Step 6: Final answer
    x = 9,267.52

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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.