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Finding the Fourth Proportional to 19,989.68, 29,985 and 6,841.96

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Solution

The fourth proportional to 19,989.68, 29,985 and 6,841.96 is: 10,263.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,989.68 : 29,985 = 6,841.96 : x
  2. Step 2: Convert to fraction form
    19,989.68/29,985 = 6,841.96/x
  3. Step 3: Cross multiply
    19,989.68x = 29,985 × 6,841.96
  4. Step 4: Simplify right side
    19,989.68x = 205,156,170.60
  5. Step 5: Solve for x
    x = 205,156,170.60/19,989.68
  6. Step 6: Final answer
    x = 10,263.10

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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.