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Finding the Fourth Proportional to 28,395.60, 42,593.40 and 12,843.60

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Solution

The fourth proportional to 28,395.60, 42,593.40 and 12,843.60 is: 19,265.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,395.60 : 42,593.40 = 12,843.60 : x
  2. Step 2: Convert to fraction form
    28,395.60/42,593.40 = 12,843.60/x
  3. Step 3: Cross multiply
    28,395.60x = 42,593.40 × 12,843.60
  4. Step 4: Simplify right side
    28,395.60x = 547,052,592.24
  5. Step 5: Solve for x
    x = 547,052,592.24/28,395.60
  6. Step 6: Final answer
    x = 19,265.40

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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.