Home / 7,981.06-11,008.59-4,991.71

Finding the Fourth Proportional to 7,981.06, 11,008.59 and 4,991.71

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Solution

The fourth proportional to 7,981.06, 11,008.59 and 4,991.71 is: 6,885.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.06 : 11,008.59 = 4,991.71 : x
  2. Step 2: Convert to fraction form
    7,981.06/11,008.59 = 4,991.71/x
  3. Step 3: Cross multiply
    7,981.06x = 11,008.59 × 4,991.71
  4. Step 4: Simplify right side
    7,981.06x = 54,951,646.27
  5. Step 5: Solve for x
    x = 54,951,646.27/7,981.06
  6. Step 6: Final answer
    x = 6,885.25

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Double scale
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Similar ratio
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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.