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Finding the Fourth Proportional to 19,167.48, 28,697.84 and 9,787.20

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Solution

The fourth proportional to 19,167.48, 28,697.84 and 9,787.20 is: 14,653.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,167.48 : 28,697.84 = 9,787.20 : x
  2. Step 2: Convert to fraction form
    19,167.48/28,697.84 = 9,787.20/x
  3. Step 3: Cross multiply
    19,167.48x = 28,697.84 × 9,787.20
  4. Step 4: Simplify right side
    19,167.48x = 280,871,499.65
  5. Step 5: Solve for x
    x = 280,871,499.65/19,167.48
  6. Step 6: Final answer
    x = 14,653.54

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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.