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Finding the Fourth Proportional to 18,792.65, 28,188.95 and 7,699.36

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Solution

The fourth proportional to 18,792.65, 28,188.95 and 7,699.36 is: 11,549.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,792.65 : 28,188.95 = 7,699.36 : x
  2. Step 2: Convert to fraction form
    18,792.65/28,188.95 = 7,699.36/x
  3. Step 3: Cross multiply
    18,792.65x = 28,188.95 × 7,699.36
  4. Step 4: Simplify right side
    18,792.65x = 217,036,787.61
  5. Step 5: Solve for x
    x = 217,036,787.61/18,792.65
  6. Step 6: Final answer
    x = 11,549.03

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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.