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Finding the Fourth Proportional to 15,118.16, 20,863.04 and 8,403.57

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Solution

The fourth proportional to 15,118.16, 20,863.04 and 8,403.57 is: 11,596.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,118.16 : 20,863.04 = 8,403.57 : x
  2. Step 2: Convert to fraction form
    15,118.16/20,863.04 = 8,403.57/x
  3. Step 3: Cross multiply
    15,118.16x = 20,863.04 × 8,403.57
  4. Step 4: Simplify right side
    15,118.16x = 175,323,975.03
  5. Step 5: Solve for x
    x = 175,323,975.03/15,118.16
  6. Step 6: Final answer
    x = 11,596.92

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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.