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Finding the Fourth Proportional to 21,991.39, 32,991.71 and 7,199.16

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Solution

The fourth proportional to 21,991.39, 32,991.71 and 7,199.16 is: 10,800.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,991.39 : 32,991.71 = 7,199.16 : x
  2. Step 2: Convert to fraction form
    21,991.39/32,991.71 = 7,199.16/x
  3. Step 3: Cross multiply
    21,991.39x = 32,991.71 × 7,199.16
  4. Step 4: Simplify right side
    21,991.39x = 237,512,598.96
  5. Step 5: Solve for x
    x = 237,512,598.96/21,991.39
  6. Step 6: Final answer
    x = 10,800.25

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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.