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Finding the Fourth Proportional to 18,641.36, 25,725.12 and 10,258.40

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Solution

The fourth proportional to 18,641.36, 25,725.12 and 10,258.40 is: 14,156.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,641.36 : 25,725.12 = 10,258.40 : x
  2. Step 2: Convert to fraction form
    18,641.36/25,725.12 = 10,258.40/x
  3. Step 3: Cross multiply
    18,641.36x = 25,725.12 × 10,258.40
  4. Step 4: Simplify right side
    18,641.36x = 263,898,571.01
  5. Step 5: Solve for x
    x = 263,898,571.01/18,641.36
  6. Step 6: Final answer
    x = 14,156.62

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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.