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Finding the Fourth Proportional to 6,607.72, 9,913.84 and 4,139.58

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Solution

The fourth proportional to 6,607.72, 9,913.84 and 4,139.58 is: 6,210.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,607.72 : 9,913.84 = 4,139.58 : x
  2. Step 2: Convert to fraction form
    6,607.72/9,913.84 = 4,139.58/x
  3. Step 3: Cross multiply
    6,607.72x = 9,913.84 × 4,139.58
  4. Step 4: Simplify right side
    6,607.72x = 41,039,133.79
  5. Step 5: Solve for x
    x = 41,039,133.79/6,607.72
  6. Step 6: Final answer
    x = 6,210.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.