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Finding the Fourth Proportional to 19,552.80, 29,256.30 and 12,991.80

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Solution

The fourth proportional to 19,552.80, 29,256.30 and 12,991.80 is: 19,439.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,552.80 : 29,256.30 = 12,991.80 : x
  2. Step 2: Convert to fraction form
    19,552.80/29,256.30 = 12,991.80/x
  3. Step 3: Cross multiply
    19,552.80x = 29,256.30 × 12,991.80
  4. Step 4: Simplify right side
    19,552.80x = 380,091,998.34
  5. Step 5: Solve for x
    x = 380,091,998.34/19,552.80
  6. Step 6: Final answer
    x = 19,439.26

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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.