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Finding the Fourth Proportional to 7,720.40, 10,654.06 and 4,363.20

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Solution

The fourth proportional to 7,720.40, 10,654.06 and 4,363.20 is: 6,021.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,720.40 : 10,654.06 = 4,363.20 : x
  2. Step 2: Convert to fraction form
    7,720.40/10,654.06 = 4,363.20/x
  3. Step 3: Cross multiply
    7,720.40x = 10,654.06 × 4,363.20
  4. Step 4: Simplify right side
    7,720.40x = 46,485,794.59
  5. Step 5: Solve for x
    x = 46,485,794.59/7,720.40
  6. Step 6: Final answer
    x = 6,021.16

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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.