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Finding the Fourth Proportional to 18,687.52, 25,790.60 and 13,963.60

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Solution

The fourth proportional to 18,687.52, 25,790.60 and 13,963.60 is: 19,271.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687.52 : 25,790.60 = 13,963.60 : x
  2. Step 2: Convert to fraction form
    18,687.52/25,790.60 = 13,963.60/x
  3. Step 3: Cross multiply
    18,687.52x = 25,790.60 × 13,963.60
  4. Step 4: Simplify right side
    18,687.52x = 360,129,622.16
  5. Step 5: Solve for x
    x = 360,129,622.16/18,687.52
  6. Step 6: Final answer
    x = 19,271.13

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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.