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Finding the Fourth Proportional to 18,657.20, 27,937.20 and 17,782.40

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Solution

The fourth proportional to 18,657.20, 27,937.20 and 17,782.40 is: 26,627.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,657.20 : 27,937.20 = 17,782.40 : x
  2. Step 2: Convert to fraction form
    18,657.20/27,937.20 = 17,782.40/x
  3. Step 3: Cross multiply
    18,657.20x = 27,937.20 × 17,782.40
  4. Step 4: Simplify right side
    18,657.20x = 496,790,465.28
  5. Step 5: Solve for x
    x = 496,790,465.28/18,657.20
  6. Step 6: Final answer
    x = 26,627.28

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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.