Home / 19,161.45-28,688.85-9,781.20

Finding the Fourth Proportional to 19,161.45, 28,688.85 and 9,781.20

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Solution

The fourth proportional to 19,161.45, 28,688.85 and 9,781.20 is: 14,644.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,161.45 : 28,688.85 = 9,781.20 : x
  2. Step 2: Convert to fraction form
    19,161.45/28,688.85 = 9,781.20/x
  3. Step 3: Cross multiply
    19,161.45x = 28,688.85 × 9,781.20
  4. Step 4: Simplify right side
    19,161.45x = 280,611,379.62
  5. Step 5: Solve for x
    x = 280,611,379.62/19,161.45
  6. Step 6: Final answer
    x = 14,644.58

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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.