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Finding the Fourth Proportional to 13,508.01, 18,640.44 and 7,539.55

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Solution

The fourth proportional to 13,508.01, 18,640.44 and 7,539.55 is: 10,404.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,508.01 : 18,640.44 = 7,539.55 : x
  2. Step 2: Convert to fraction form
    13,508.01/18,640.44 = 7,539.55/x
  3. Step 3: Cross multiply
    13,508.01x = 18,640.44 × 7,539.55
  4. Step 4: Simplify right side
    13,508.01x = 140,540,482.80
  5. Step 5: Solve for x
    x = 140,540,482.80/13,508.01
  6. Step 6: Final answer
    x = 10,404.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.