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Finding the Fourth Proportional to 18,870.93, 28,306.41 and 5,019.93

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Solution

The fourth proportional to 18,870.93, 28,306.41 and 5,019.93 is: 7,529.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,870.93 : 28,306.41 = 5,019.93 : x
  2. Step 2: Convert to fraction form
    18,870.93/28,306.41 = 5,019.93/x
  3. Step 3: Cross multiply
    18,870.93x = 28,306.41 × 5,019.93
  4. Step 4: Simplify right side
    18,870.93x = 142,096,196.75
  5. Step 5: Solve for x
    x = 142,096,196.75/18,870.93
  6. Step 6: Final answer
    x = 7,529.90

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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.