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Finding the Fourth Proportional to 21,987.87, 32,984.54 and 7,192.81

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Solution

The fourth proportional to 21,987.87, 32,984.54 and 7,192.81 is: 10,790.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,987.87 : 32,984.54 = 7,192.81 : x
  2. Step 2: Convert to fraction form
    21,987.87/32,984.54 = 7,192.81/x
  3. Step 3: Cross multiply
    21,987.87x = 32,984.54 × 7,192.81
  4. Step 4: Simplify right side
    21,987.87x = 237,251,529.16
  5. Step 5: Solve for x
    x = 237,251,529.16/21,987.87
  6. Step 6: Final answer
    x = 10,790.11

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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.