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Finding the Fourth Proportional to 18,960.48, 28,444.32 and 7,860.96

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Solution

The fourth proportional to 18,960.48, 28,444.32 and 7,860.96 is: 11,792.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,960.48 : 28,444.32 = 7,860.96 : x
  2. Step 2: Convert to fraction form
    18,960.48/28,444.32 = 7,860.96/x
  3. Step 3: Cross multiply
    18,960.48x = 28,444.32 × 7,860.96
  4. Step 4: Simplify right side
    18,960.48x = 223,599,661.75
  5. Step 5: Solve for x
    x = 223,599,661.75/18,960.48
  6. Step 6: Final answer
    x = 11,792.93

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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.