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Finding the Fourth Proportional to 18,707.93, 28,061.83 and 4,856.93

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Solution

The fourth proportional to 18,707.93, 28,061.83 and 4,856.93 is: 7,285.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,707.93 : 28,061.83 = 4,856.93 : x
  2. Step 2: Convert to fraction form
    18,707.93/28,061.83 = 4,856.93/x
  3. Step 3: Cross multiply
    18,707.93x = 28,061.83 × 4,856.93
  4. Step 4: Simplify right side
    18,707.93x = 136,294,319.70
  5. Step 5: Solve for x
    x = 136,294,319.70/18,707.93
  6. Step 6: Final answer
    x = 7,285.38

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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.