Home / 12,961.98-17,891.91-8,988.36

Finding the Fourth Proportional to 12,961.98, 17,891.91 and 8,988.36

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Solution

The fourth proportional to 12,961.98, 17,891.91 and 8,988.36 is: 12,406.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,961.98 : 17,891.91 = 8,988.36 : x
  2. Step 2: Convert to fraction form
    12,961.98/17,891.91 = 8,988.36/x
  3. Step 3: Cross multiply
    12,961.98x = 17,891.91 × 8,988.36
  4. Step 4: Simplify right side
    12,961.98x = 160,818,928.17
  5. Step 5: Solve for x
    x = 160,818,928.17/12,961.98
  6. Step 6: Final answer
    x = 12,406.97

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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.