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Finding the Fourth Proportional to 18,763.87, 25,864.36 and 14,778.67

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Solution

The fourth proportional to 18,763.87, 25,864.36 and 14,778.67 is: 20,371.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,763.87 : 25,864.36 = 14,778.67 : x
  2. Step 2: Convert to fraction form
    18,763.87/25,864.36 = 14,778.67/x
  3. Step 3: Cross multiply
    18,763.87x = 25,864.36 × 14,778.67
  4. Step 4: Simplify right side
    18,763.87x = 382,240,841.20
  5. Step 5: Solve for x
    x = 382,240,841.20/18,763.87
  6. Step 6: Final answer
    x = 20,371.11

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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.