Home / 8,936.61-12,338.55-7,989.36

Finding the Fourth Proportional to 8,936.61, 12,338.55 and 7,989.36

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Solution

The fourth proportional to 8,936.61, 12,338.55 and 7,989.36 is: 11,030.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,936.61 : 12,338.55 = 7,989.36 : x
  2. Step 2: Convert to fraction form
    8,936.61/12,338.55 = 7,989.36/x
  3. Step 3: Cross multiply
    8,936.61x = 12,338.55 × 7,989.36
  4. Step 4: Simplify right side
    8,936.61x = 98,577,117.83
  5. Step 5: Solve for x
    x = 98,577,117.83/8,936.61
  6. Step 6: Final answer
    x = 11,030.71

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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.