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Finding the Fourth Proportional to 18,745.17, 25,870.95 and 18,129.84

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Solution

The fourth proportional to 18,745.17, 25,870.95 and 18,129.84 is: 25,021.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,745.17 : 25,870.95 = 18,129.84 : x
  2. Step 2: Convert to fraction form
    18,745.17/25,870.95 = 18,129.84/x
  3. Step 3: Cross multiply
    18,745.17x = 25,870.95 × 18,129.84
  4. Step 4: Simplify right side
    18,745.17x = 469,036,184.15
  5. Step 5: Solve for x
    x = 469,036,184.15/18,745.17
  6. Step 6: Final answer
    x = 25,021.71

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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.