Home / 21,979.04-32,961.72-7,937.28

Finding the Fourth Proportional to 21,979.04, 32,961.72 and 7,937.28

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Solution

The fourth proportional to 21,979.04, 32,961.72 and 7,937.28 is: 11,903.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.04 : 32,961.72 = 7,937.28 : x
  2. Step 2: Convert to fraction form
    21,979.04/32,961.72 = 7,937.28/x
  3. Step 3: Cross multiply
    21,979.04x = 32,961.72 × 7,937.28
  4. Step 4: Simplify right side
    21,979.04x = 261,626,400.92
  5. Step 5: Solve for x
    x = 261,626,400.92/21,979.04
  6. Step 6: Final answer
    x = 11,903.45

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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.