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Finding the Fourth Proportional to 19,388.80, 29,010.30 and 12,827.80

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Solution

The fourth proportional to 19,388.80, 29,010.30 and 12,827.80 is: 19,193.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,388.80 : 29,010.30 = 12,827.80 : x
  2. Step 2: Convert to fraction form
    19,388.80/29,010.30 = 12,827.80/x
  3. Step 3: Cross multiply
    19,388.80x = 29,010.30 × 12,827.80
  4. Step 4: Simplify right side
    19,388.80x = 372,138,326.34
  5. Step 5: Solve for x
    x = 372,138,326.34/19,388.80
  6. Step 6: Final answer
    x = 19,193.47

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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.