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Finding the Fourth Proportional to 7,690.55, 10,611.81 and 5,037.59

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Solution

The fourth proportional to 7,690.55, 10,611.81 and 5,037.59 is: 6,951.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,690.55 : 10,611.81 = 5,037.59 : x
  2. Step 2: Convert to fraction form
    7,690.55/10,611.81 = 5,037.59/x
  3. Step 3: Cross multiply
    7,690.55x = 10,611.81 × 5,037.59
  4. Step 4: Simplify right side
    7,690.55x = 53,457,974.47
  5. Step 5: Solve for x
    x = 53,457,974.47/7,690.55
  6. Step 6: Final answer
    x = 6,951.13

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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.