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Finding the Fourth Proportional to 18,258.71, 25,190.27 and 13,490.14

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Solution

The fourth proportional to 18,258.71, 25,190.27 and 13,490.14 is: 18,611.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,258.71 : 25,190.27 = 13,490.14 : x
  2. Step 2: Convert to fraction form
    18,258.71/25,190.27 = 13,490.14/x
  3. Step 3: Cross multiply
    18,258.71x = 25,190.27 × 13,490.14
  4. Step 4: Simplify right side
    18,258.71x = 339,820,138.51
  5. Step 5: Solve for x
    x = 339,820,138.51/18,258.71
  6. Step 6: Final answer
    x = 18,611.40

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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.