Home / 6,985.40-9,640.62-4,001.72

Finding the Fourth Proportional to 6,985.40, 9,640.62 and 4,001.72

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Solution

The fourth proportional to 6,985.40, 9,640.62 and 4,001.72 is: 5,522.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,985.40 : 9,640.62 = 4,001.72 : x
  2. Step 2: Convert to fraction form
    6,985.40/9,640.62 = 4,001.72/x
  3. Step 3: Cross multiply
    6,985.40x = 9,640.62 × 4,001.72
  4. Step 4: Simplify right side
    6,985.40x = 38,579,061.87
  5. Step 5: Solve for x
    x = 38,579,061.87/6,985.40
  6. Step 6: Final answer
    x = 5,522.81

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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.