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Finding the Fourth Proportional to 7,108.72, 9,810.36 and 3,965.20

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Solution

The fourth proportional to 7,108.72, 9,810.36 and 3,965.20 is: 5,472.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,108.72 : 9,810.36 = 3,965.20 : x
  2. Step 2: Convert to fraction form
    7,108.72/9,810.36 = 3,965.20/x
  3. Step 3: Cross multiply
    7,108.72x = 9,810.36 × 3,965.20
  4. Step 4: Simplify right side
    7,108.72x = 38,900,039.47
  5. Step 5: Solve for x
    x = 38,900,039.47/7,108.72
  6. Step 6: Final answer
    x = 5,472.16

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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.