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Finding the Fourth Proportional to 21,976.20, 32,960.93 and 7,185.20

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Solution

The fourth proportional to 21,976.20, 32,960.93 and 7,185.20 is: 10,776.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,976.20 : 32,960.93 = 7,185.20 : x
  2. Step 2: Convert to fraction form
    21,976.20/32,960.93 = 7,185.20/x
  3. Step 3: Cross multiply
    21,976.20x = 32,960.93 × 7,185.20
  4. Step 4: Simplify right side
    21,976.20x = 236,830,673.51
  5. Step 5: Solve for x
    x = 236,830,673.51/21,976.20
  6. Step 6: Final answer
    x = 10,776.69

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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.