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Finding the Fourth Proportional to 7,689.72, 10,611.81 and 4,152.93

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Solution

The fourth proportional to 7,689.72, 10,611.81 and 4,152.93 is: 5,731.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,689.72 : 10,611.81 = 4,152.93 : x
  2. Step 2: Convert to fraction form
    7,689.72/10,611.81 = 4,152.93/x
  3. Step 3: Cross multiply
    7,689.72x = 10,611.81 × 4,152.93
  4. Step 4: Simplify right side
    7,689.72x = 44,070,053.93
  5. Step 5: Solve for x
    x = 44,070,053.93/7,689.72
  6. Step 6: Final answer
    x = 5,731.04

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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.