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Finding the Fourth Proportional to 19,980.60, 29,927.70 and 17,791.80

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Solution

The fourth proportional to 19,980.60, 29,927.70 and 17,791.80 is: 26,649.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,980.60 : 29,927.70 = 17,791.80 : x
  2. Step 2: Convert to fraction form
    19,980.60/29,927.70 = 17,791.80/x
  3. Step 3: Cross multiply
    19,980.60x = 29,927.70 × 17,791.80
  4. Step 4: Simplify right side
    19,980.60x = 532,467,652.86
  5. Step 5: Solve for x
    x = 532,467,652.86/19,980.60
  6. Step 6: Final answer
    x = 26,649.23

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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.