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Finding the Fourth Proportional to 10,276.80, 15,415.20 and 9,067.20

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Solution

The fourth proportional to 10,276.80, 15,415.20 and 9,067.20 is: 13,600.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,276.80 : 15,415.20 = 9,067.20 : x
  2. Step 2: Convert to fraction form
    10,276.80/15,415.20 = 9,067.20/x
  3. Step 3: Cross multiply
    10,276.80x = 15,415.20 × 9,067.20
  4. Step 4: Simplify right side
    10,276.80x = 139,772,701.44
  5. Step 5: Solve for x
    x = 139,772,701.44/10,276.80
  6. Step 6: Final answer
    x = 13,600.80

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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.