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Finding the Fourth Proportional to 28,658.89, 42,974.50 and 12,014.45

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Solution

The fourth proportional to 28,658.89, 42,974.50 and 12,014.45 is: 18,015.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,658.89 : 42,974.50 = 12,014.45 : x
  2. Step 2: Convert to fraction form
    28,658.89/42,974.50 = 12,014.45/x
  3. Step 3: Cross multiply
    28,658.89x = 42,974.50 × 12,014.45
  4. Step 4: Simplify right side
    28,658.89x = 516,314,981.53
  5. Step 5: Solve for x
    x = 516,314,981.53/28,658.89
  6. Step 6: Final answer
    x = 18,015.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.