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Finding the Fourth Proportional to 19,182.50, 28,786.80 and 6,870.50

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Solution

The fourth proportional to 19,182.50, 28,786.80 and 6,870.50 is: 10,310.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,182.50 : 28,786.80 = 6,870.50 : x
  2. Step 2: Convert to fraction form
    19,182.50/28,786.80 = 6,870.50/x
  3. Step 3: Cross multiply
    19,182.50x = 28,786.80 × 6,870.50
  4. Step 4: Simplify right side
    19,182.50x = 197,779,709.40
  5. Step 5: Solve for x
    x = 197,779,709.40/19,182.50
  6. Step 6: Final answer
    x = 10,310.42

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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.