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Finding the Fourth Proportional to 6,985.46, 9,640.49 and 4,002.03

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Solution

The fourth proportional to 6,985.46, 9,640.49 and 4,002.03 is: 5,523.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,985.46 : 9,640.49 = 4,002.03 : x
  2. Step 2: Convert to fraction form
    6,985.46/9,640.49 = 4,002.03/x
  3. Step 3: Cross multiply
    6,985.46x = 9,640.49 × 4,002.03
  4. Step 4: Simplify right side
    6,985.46x = 38,581,510.18
  5. Step 5: Solve for x
    x = 38,581,510.18/6,985.46
  6. Step 6: Final answer
    x = 5,523.11

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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.