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Finding the Fourth Proportional to 4,065.68, 5,607.68 and 3,930.16

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Solution

The fourth proportional to 4,065.68, 5,607.68 and 3,930.16 is: 5,420.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,065.68 : 5,607.68 = 3,930.16 : x
  2. Step 2: Convert to fraction form
    4,065.68/5,607.68 = 3,930.16/x
  3. Step 3: Cross multiply
    4,065.68x = 5,607.68 × 3,930.16
  4. Step 4: Simplify right side
    4,065.68x = 22,039,079.63
  5. Step 5: Solve for x
    x = 22,039,079.63/4,065.68
  6. Step 6: Final answer
    x = 5,420.76

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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.