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Finding the Fourth Proportional to 13,862.72, 20,808.88 and 5,969.15

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Solution

The fourth proportional to 13,862.72, 20,808.88 and 5,969.15 is: 8,960.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,862.72 : 20,808.88 = 5,969.15 : x
  2. Step 2: Convert to fraction form
    13,862.72/20,808.88 = 5,969.15/x
  3. Step 3: Cross multiply
    13,862.72x = 20,808.88 × 5,969.15
  4. Step 4: Simplify right side
    13,862.72x = 124,211,222.01
  5. Step 5: Solve for x
    x = 124,211,222.01/13,862.72
  6. Step 6: Final answer
    x = 8,960.09

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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.