Home / 21,979.96-32,963.11-7,938.16

Finding the Fourth Proportional to 21,979.96, 32,963.11 and 7,938.16

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Solution

The fourth proportional to 21,979.96, 32,963.11 and 7,938.16 is: 11,904.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.96 : 32,963.11 = 7,938.16 : x
  2. Step 2: Convert to fraction form
    21,979.96/32,963.11 = 7,938.16/x
  3. Step 3: Cross multiply
    21,979.96x = 32,963.11 × 7,938.16
  4. Step 4: Simplify right side
    21,979.96x = 261,666,339.02
  5. Step 5: Solve for x
    x = 261,666,339.02/21,979.96
  6. Step 6: Final answer
    x = 11,904.77

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.