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Finding the Fourth Proportional to 6,702.40, 9,242.72 and 6,172.66

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Solution

The fourth proportional to 6,702.40, 9,242.72 and 6,172.66 is: 8,512.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,702.40 : 9,242.72 = 6,172.66 : x
  2. Step 2: Convert to fraction form
    6,702.40/9,242.72 = 6,172.66/x
  3. Step 3: Cross multiply
    6,702.40x = 9,242.72 × 6,172.66
  4. Step 4: Simplify right side
    6,702.40x = 57,052,168.04
  5. Step 5: Solve for x
    x = 57,052,168.04/6,702.40
  6. Step 6: Final answer
    x = 8,512.20

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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.