Home / 8,928.36-12,327.12-7,981.11

Finding the Fourth Proportional to 8,928.36, 12,327.12 and 7,981.11

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Solution

The fourth proportional to 8,928.36, 12,327.12 and 7,981.11 is: 11,019.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,928.36 : 12,327.12 = 7,981.11 : x
  2. Step 2: Convert to fraction form
    8,928.36/12,327.12 = 7,981.11/x
  3. Step 3: Cross multiply
    8,928.36x = 12,327.12 × 7,981.11
  4. Step 4: Simplify right side
    8,928.36x = 98,384,100.70
  5. Step 5: Solve for x
    x = 98,384,100.70/8,928.36
  6. Step 6: Final answer
    x = 11,019.28

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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.