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Finding the Fourth Proportional to 18,765.87, 25,867.13 and 14,780.67

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Solution

The fourth proportional to 18,765.87, 25,867.13 and 14,780.67 is: 20,373.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,765.87 : 25,867.13 = 14,780.67 : x
  2. Step 2: Convert to fraction form
    18,765.87/25,867.13 = 14,780.67/x
  3. Step 3: Cross multiply
    18,765.87x = 25,867.13 × 14,780.67
  4. Step 4: Simplify right side
    18,765.87x = 382,333,438.47
  5. Step 5: Solve for x
    x = 382,333,438.47/18,765.87
  6. Step 6: Final answer
    x = 20,373.87

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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.