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Finding the Fourth Proportional to 13,881.16, 20,823.90 and 4,645

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Solution

The fourth proportional to 13,881.16, 20,823.90 and 4,645 is: 6,968.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,881.16 : 20,823.90 = 4,645 : x
  2. Step 2: Convert to fraction form
    13,881.16/20,823.90 = 4,645/x
  3. Step 3: Cross multiply
    13,881.16x = 20,823.90 × 4,645
  4. Step 4: Simplify right side
    13,881.16x = 96,727,015.50
  5. Step 5: Solve for x
    x = 96,727,015.50/13,881.16
  6. Step 6: Final answer
    x = 6,968.22

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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.