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Finding the Fourth Proportional to 14,982.90, 22,490.55 and 8,421.90

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Solution

The fourth proportional to 14,982.90, 22,490.55 and 8,421.90 is: 12,641.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,982.90 : 22,490.55 = 8,421.90 : x
  2. Step 2: Convert to fraction form
    14,982.90/22,490.55 = 8,421.90/x
  3. Step 3: Cross multiply
    14,982.90x = 22,490.55 × 8,421.90
  4. Step 4: Simplify right side
    14,982.90x = 189,413,163.05
  5. Step 5: Solve for x
    x = 189,413,163.05/14,982.90
  6. Step 6: Final answer
    x = 12,641.96

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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.