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Finding the Fourth Proportional to 6,931.72, 9,568.38 and 4,705.12

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Solution

The fourth proportional to 6,931.72, 9,568.38 and 4,705.12 is: 6,494.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,931.72 : 9,568.38 = 4,705.12 : x
  2. Step 2: Convert to fraction form
    6,931.72/9,568.38 = 4,705.12/x
  3. Step 3: Cross multiply
    6,931.72x = 9,568.38 × 4,705.12
  4. Step 4: Simplify right side
    6,931.72x = 45,020,376.11
  5. Step 5: Solve for x
    x = 45,020,376.11/6,931.72
  6. Step 6: Final answer
    x = 6,494.83

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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.