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Finding the Fourth Proportional to 18,701.25, 25,805.88 and 13,048.15

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Solution

The fourth proportional to 18,701.25, 25,805.88 and 13,048.15 is: 18,005.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,701.25 : 25,805.88 = 13,048.15 : x
  2. Step 2: Convert to fraction form
    18,701.25/25,805.88 = 13,048.15/x
  3. Step 3: Cross multiply
    18,701.25x = 25,805.88 × 13,048.15
  4. Step 4: Simplify right side
    18,701.25x = 336,718,928.61
  5. Step 5: Solve for x
    x = 336,718,928.61/18,701.25
  6. Step 6: Final answer
    x = 18,005.16

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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.