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Finding the Fourth Proportional to 21,988.45, 32,984.70 and 8,838.10

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Solution

The fourth proportional to 21,988.45, 32,984.70 and 8,838.10 is: 13,257.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,988.45 : 32,984.70 = 8,838.10 : x
  2. Step 2: Convert to fraction form
    21,988.45/32,984.70 = 8,838.10/x
  3. Step 3: Cross multiply
    21,988.45x = 32,984.70 × 8,838.10
  4. Step 4: Simplify right side
    21,988.45x = 291,522,077.07
  5. Step 5: Solve for x
    x = 291,522,077.07/21,988.45
  6. Step 6: Final answer
    x = 13,257.96

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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.