Home / 11,891.32-16,412.97-7,178.74

Finding the Fourth Proportional to 11,891.32, 16,412.97 and 7,178.74

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Solution

The fourth proportional to 11,891.32, 16,412.97 and 7,178.74 is: 9,908.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,891.32 : 16,412.97 = 7,178.74 : x
  2. Step 2: Convert to fraction form
    11,891.32/16,412.97 = 7,178.74/x
  3. Step 3: Cross multiply
    11,891.32x = 16,412.97 × 7,178.74
  4. Step 4: Simplify right side
    11,891.32x = 117,824,444.26
  5. Step 5: Solve for x
    x = 117,824,444.26/11,891.32
  6. Step 6: Final answer
    x = 9,908.44

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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.