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Finding the Fourth Proportional to 17,809.80, 26,714.70 and 7,420.20

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Solution

The fourth proportional to 17,809.80, 26,714.70 and 7,420.20 is: 11,130.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,809.80 : 26,714.70 = 7,420.20 : x
  2. Step 2: Convert to fraction form
    17,809.80/26,714.70 = 7,420.20/x
  3. Step 3: Cross multiply
    17,809.80x = 26,714.70 × 7,420.20
  4. Step 4: Simplify right side
    17,809.80x = 198,228,416.94
  5. Step 5: Solve for x
    x = 198,228,416.94/17,809.80
  6. Step 6: Final answer
    x = 11,130.30

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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.