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Finding the Fourth Proportional to 21,989.54, 32,990.44 and 7,199.40

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Solution

The fourth proportional to 21,989.54, 32,990.44 and 7,199.40 is: 10,801.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,989.54 : 32,990.44 = 7,199.40 : x
  2. Step 2: Convert to fraction form
    21,989.54/32,990.44 = 7,199.40/x
  3. Step 3: Cross multiply
    21,989.54x = 32,990.44 × 7,199.40
  4. Step 4: Simplify right side
    21,989.54x = 237,511,373.74
  5. Step 5: Solve for x
    x = 237,511,373.74/21,989.54
  6. Step 6: Final answer
    x = 10,801.11

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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.