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Finding the Fourth Proportional to 18,875.73, 28,326.36 and 7,188.65

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Solution

The fourth proportional to 18,875.73, 28,326.36 and 7,188.65 is: 10,787.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,875.73 : 28,326.36 = 7,188.65 : x
  2. Step 2: Convert to fraction form
    18,875.73/28,326.36 = 7,188.65/x
  3. Step 3: Cross multiply
    18,875.73x = 28,326.36 × 7,188.65
  4. Step 4: Simplify right side
    18,875.73x = 203,628,287.81
  5. Step 5: Solve for x
    x = 203,628,287.81/18,875.73
  6. Step 6: Final answer
    x = 10,787.84

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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.