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Finding the Fourth Proportional to 21,891.72, 32,841.86 and 7,847.98

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Solution

The fourth proportional to 21,891.72, 32,841.86 and 7,847.98 is: 11,773.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,891.72 : 32,841.86 = 7,847.98 : x
  2. Step 2: Convert to fraction form
    21,891.72/32,841.86 = 7,847.98/x
  3. Step 3: Cross multiply
    21,891.72x = 32,841.86 × 7,847.98
  4. Step 4: Simplify right side
    21,891.72x = 257,742,260.44
  5. Step 5: Solve for x
    x = 257,742,260.44/21,891.72
  6. Step 6: Final answer
    x = 11,773.50

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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.