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Finding the Fourth Proportional to 6,985.73, 9,639.91 and 4,001.75

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Solution

The fourth proportional to 6,985.73, 9,639.91 and 4,001.75 is: 5,522.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,985.73 : 9,639.91 = 4,001.75 : x
  2. Step 2: Convert to fraction form
    6,985.73/9,639.91 = 4,001.75/x
  3. Step 3: Cross multiply
    6,985.73x = 9,639.91 × 4,001.75
  4. Step 4: Simplify right side
    6,985.73x = 38,576,533.94
  5. Step 5: Solve for x
    x = 38,576,533.94/6,985.73
  6. Step 6: Final answer
    x = 5,522.19

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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.