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Finding the Fourth Proportional to 13,689.47, 20,526.01 and 4,325.47

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Solution

The fourth proportional to 13,689.47, 20,526.01 and 4,325.47 is: 6,485.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,689.47 : 20,526.01 = 4,325.47 : x
  2. Step 2: Convert to fraction form
    13,689.47/20,526.01 = 4,325.47/x
  3. Step 3: Cross multiply
    13,689.47x = 20,526.01 × 4,325.47
  4. Step 4: Simplify right side
    13,689.47x = 88,784,578.35
  5. Step 5: Solve for x
    x = 88,784,578.35/13,689.47
  6. Step 6: Final answer
    x = 6,485.61

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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.