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Finding the Fourth Proportional to 7,108.04, 9,809.13 and 3,921.28

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Solution

The fourth proportional to 7,108.04, 9,809.13 and 3,921.28 is: 5,411.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,108.04 : 9,809.13 = 3,921.28 : x
  2. Step 2: Convert to fraction form
    7,108.04/9,809.13 = 3,921.28/x
  3. Step 3: Cross multiply
    7,108.04x = 9,809.13 × 3,921.28
  4. Step 4: Simplify right side
    7,108.04x = 38,464,335.47
  5. Step 5: Solve for x
    x = 38,464,335.47/7,108.04
  6. Step 6: Final answer
    x = 5,411.38

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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.