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Finding the Fourth Proportional to 13,689.53, 20,534.15 and 4,329.54

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Solution

The fourth proportional to 13,689.53, 20,534.15 and 4,329.54 is: 6,494.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,689.53 : 20,534.15 = 4,329.54 : x
  2. Step 2: Convert to fraction form
    13,689.53/20,534.15 = 4,329.54/x
  3. Step 3: Cross multiply
    13,689.53x = 20,534.15 × 4,329.54
  4. Step 4: Simplify right side
    13,689.53x = 88,903,434.61
  5. Step 5: Solve for x
    x = 88,903,434.61/13,689.53
  6. Step 6: Final answer
    x = 6,494.27

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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.