Home / 7,803.12-11,705.84-2,872.40

Finding the Fourth Proportional to 7,803.12, 11,705.84 and 2,872.40

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Solution

The fourth proportional to 7,803.12, 11,705.84 and 2,872.40 is: 4,309.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,803.12 : 11,705.84 = 2,872.40 : x
  2. Step 2: Convert to fraction form
    7,803.12/11,705.84 = 2,872.40/x
  3. Step 3: Cross multiply
    7,803.12x = 11,705.84 × 2,872.40
  4. Step 4: Simplify right side
    7,803.12x = 33,623,840.45
  5. Step 5: Solve for x
    x = 33,623,840.45/7,803.12
  6. Step 6: Final answer
    x = 4,309.03

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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.