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Finding the Fourth Proportional to 28,671.70, 43,007.55 and 7,611.70

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Solution

The fourth proportional to 28,671.70, 43,007.55 and 7,611.70 is: 11,417.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,671.70 : 43,007.55 = 7,611.70 : x
  2. Step 2: Convert to fraction form
    28,671.70/43,007.55 = 7,611.70/x
  3. Step 3: Cross multiply
    28,671.70x = 43,007.55 × 7,611.70
  4. Step 4: Simplify right side
    28,671.70x = 327,360,568.34
  5. Step 5: Solve for x
    x = 327,360,568.34/28,671.70
  6. Step 6: Final answer
    x = 11,417.55

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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.