Home / 7,280.80-10,918.40-3,118.16

Finding the Fourth Proportional to 7,280.80, 10,918.40 and 3,118.16

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Solution

The fourth proportional to 7,280.80, 10,918.40 and 3,118.16 is: 4,676.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,280.80 : 10,918.40 = 3,118.16 : x
  2. Step 2: Convert to fraction form
    7,280.80/10,918.40 = 3,118.16/x
  3. Step 3: Cross multiply
    7,280.80x = 10,918.40 × 3,118.16
  4. Step 4: Simplify right side
    7,280.80x = 34,045,318.14
  5. Step 5: Solve for x
    x = 34,045,318.14/7,280.80
  6. Step 6: Final answer
    x = 4,676.04

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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.