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Finding the Fourth Proportional to 15,173.96, 20,928.20 and 9,870.47

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Solution

The fourth proportional to 15,173.96, 20,928.20 and 9,870.47 is: 13,613.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,173.96 : 20,928.20 = 9,870.47 : x
  2. Step 2: Convert to fraction form
    15,173.96/20,928.20 = 9,870.47/x
  3. Step 3: Cross multiply
    15,173.96x = 20,928.20 × 9,870.47
  4. Step 4: Simplify right side
    15,173.96x = 206,571,120.90
  5. Step 5: Solve for x
    x = 206,571,120.90/15,173.96
  6. Step 6: Final answer
    x = 13,613.53

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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.