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Finding the Fourth Proportional to 18,551.40, 25,634.88 and 13,506.87

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Solution

The fourth proportional to 18,551.40, 25,634.88 and 13,506.87 is: 18,664.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,551.40 : 25,634.88 = 13,506.87 : x
  2. Step 2: Convert to fraction form
    18,551.40/25,634.88 = 13,506.87/x
  3. Step 3: Cross multiply
    18,551.40x = 25,634.88 × 13,506.87
  4. Step 4: Simplify right side
    18,551.40x = 346,246,991.63
  5. Step 5: Solve for x
    x = 346,246,991.63/18,551.40
  6. Step 6: Final answer
    x = 18,664.20

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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.