Home / 7,090.10-9,783.92-4,105.72

Finding the Fourth Proportional to 7,090.10, 9,783.92 and 4,105.72

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Solution

The fourth proportional to 7,090.10, 9,783.92 and 4,105.72 is: 5,665.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,090.10 : 9,783.92 = 4,105.72 : x
  2. Step 2: Convert to fraction form
    7,090.10/9,783.92 = 4,105.72/x
  3. Step 3: Cross multiply
    7,090.10x = 9,783.92 × 4,105.72
  4. Step 4: Simplify right side
    7,090.10x = 40,170,036.02
  5. Step 5: Solve for x
    x = 40,170,036.02/7,090.10
  6. Step 6: Final answer
    x = 5,665.65

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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.