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Finding the Fourth Proportional to 18,878.79, 28,318.23 and 5,027.79

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Solution

The fourth proportional to 18,878.79, 28,318.23 and 5,027.79 is: 7,541.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,878.79 : 28,318.23 = 5,027.79 : x
  2. Step 2: Convert to fraction form
    18,878.79/28,318.23 = 5,027.79/x
  3. Step 3: Cross multiply
    18,878.79x = 28,318.23 × 5,027.79
  4. Step 4: Simplify right side
    18,878.79x = 142,378,113.61
  5. Step 5: Solve for x
    x = 142,378,113.61/18,878.79
  6. Step 6: Final answer
    x = 7,541.70

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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.