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Finding the Fourth Proportional to 21,998.62, 32,989.88 and 7,955.28

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Solution

The fourth proportional to 21,998.62, 32,989.88 and 7,955.28 is: 11,930.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,998.62 : 32,989.88 = 7,955.28 : x
  2. Step 2: Convert to fraction form
    21,998.62/32,989.88 = 7,955.28/x
  3. Step 3: Cross multiply
    21,998.62x = 32,989.88 × 7,955.28
  4. Step 4: Simplify right side
    21,998.62x = 262,443,527.84
  5. Step 5: Solve for x
    x = 262,443,527.84/21,998.62
  6. Step 6: Final answer
    x = 11,930.00

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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.