Home / 11,420.80-17,139.84-7,714.24

Finding the Fourth Proportional to 11,420.80, 17,139.84 and 7,714.24

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Solution

The fourth proportional to 11,420.80, 17,139.84 and 7,714.24 is: 11,577.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,420.80 : 17,139.84 = 7,714.24 : x
  2. Step 2: Convert to fraction form
    11,420.80/17,139.84 = 7,714.24/x
  3. Step 3: Cross multiply
    11,420.80x = 17,139.84 × 7,714.24
  4. Step 4: Simplify right side
    11,420.80x = 132,220,839.32
  5. Step 5: Solve for x
    x = 132,220,839.32/11,420.80
  6. Step 6: Final answer
    x = 11,577.20

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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.