Home / 2,920.12-4,381.80-2,699.80

Finding the Fourth Proportional to 2,920.12, 4,381.80 and 2,699.80

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Solution

The fourth proportional to 2,920.12, 4,381.80 and 2,699.80 is: 4,051.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,920.12 : 4,381.80 = 2,699.80 : x
  2. Step 2: Convert to fraction form
    2,920.12/4,381.80 = 2,699.80/x
  3. Step 3: Cross multiply
    2,920.12x = 4,381.80 × 2,699.80
  4. Step 4: Simplify right side
    2,920.12x = 11,829,983.64
  5. Step 5: Solve for x
    x = 11,829,983.64/2,920.12
  6. Step 6: Final answer
    x = 4,051.20

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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.