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Finding the Fourth Proportional to 15,151.44, 20,919.28 and 9,488.48

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Solution

The fourth proportional to 15,151.44, 20,919.28 and 9,488.48 is: 13,100.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,151.44 : 20,919.28 = 9,488.48 : x
  2. Step 2: Convert to fraction form
    15,151.44/20,919.28 = 9,488.48/x
  3. Step 3: Cross multiply
    15,151.44x = 20,919.28 × 9,488.48
  4. Step 4: Simplify right side
    15,151.44x = 198,492,169.89
  5. Step 5: Solve for x
    x = 198,492,169.89/15,151.44
  6. Step 6: Final answer
    x = 13,100.55

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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.