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Finding the Fourth Proportional to 14,871.79, 22,342.25 and 8,720.11

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Solution

The fourth proportional to 14,871.79, 22,342.25 and 8,720.11 is: 13,100.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,871.79 : 22,342.25 = 8,720.11 : x
  2. Step 2: Convert to fraction form
    14,871.79/22,342.25 = 8,720.11/x
  3. Step 3: Cross multiply
    14,871.79x = 22,342.25 × 8,720.11
  4. Step 4: Simplify right side
    14,871.79x = 194,826,834.05
  5. Step 5: Solve for x
    x = 194,826,834.05/14,871.79
  6. Step 6: Final answer
    x = 13,100.43

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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.