Home / 7,817.10-10,787.20-4,279.69

Finding the Fourth Proportional to 7,817.10, 10,787.20 and 4,279.69

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Solution

The fourth proportional to 7,817.10, 10,787.20 and 4,279.69 is: 5,905.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,817.10 : 10,787.20 = 4,279.69 : x
  2. Step 2: Convert to fraction form
    7,817.10/10,787.20 = 4,279.69/x
  3. Step 3: Cross multiply
    7,817.10x = 10,787.20 × 4,279.69
  4. Step 4: Simplify right side
    7,817.10x = 46,165,871.97
  5. Step 5: Solve for x
    x = 46,165,871.97/7,817.10
  6. Step 6: Final answer
    x = 5,905.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.