Home / 7,108.12-9,809.76-3,921.71

Finding the Fourth Proportional to 7,108.12, 9,809.76 and 3,921.71

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Solution

The fourth proportional to 7,108.12, 9,809.76 and 3,921.71 is: 5,412.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,108.12 : 9,809.76 = 3,921.71 : x
  2. Step 2: Convert to fraction form
    7,108.12/9,809.76 = 3,921.71/x
  3. Step 3: Cross multiply
    7,108.12x = 9,809.76 × 3,921.71
  4. Step 4: Simplify right side
    7,108.12x = 38,470,999.55
  5. Step 5: Solve for x
    x = 38,470,999.55/7,108.12
  6. Step 6: Final answer
    x = 5,412.26

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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.