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Finding the Fourth Proportional to 9,143.70, 13,706.10 and 4,974.90

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Solution

The fourth proportional to 9,143.70, 13,706.10 and 4,974.90 is: 7,457.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,143.70 : 13,706.10 = 4,974.90 : x
  2. Step 2: Convert to fraction form
    9,143.70/13,706.10 = 4,974.90/x
  3. Step 3: Cross multiply
    9,143.70x = 13,706.10 × 4,974.90
  4. Step 4: Simplify right side
    9,143.70x = 68,186,476.89
  5. Step 5: Solve for x
    x = 68,186,476.89/9,143.70
  6. Step 6: Final answer
    x = 7,457.21

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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.