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Finding the Fourth Proportional to 28,706.76, 43,036.91 and 8,975.16

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Solution

The fourth proportional to 28,706.76, 43,036.91 and 8,975.16 is: 13,455.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,706.76 : 43,036.91 = 8,975.16 : x
  2. Step 2: Convert to fraction form
    28,706.76/43,036.91 = 8,975.16/x
  3. Step 3: Cross multiply
    28,706.76x = 43,036.91 × 8,975.16
  4. Step 4: Simplify right side
    28,706.76x = 386,263,108.28
  5. Step 5: Solve for x
    x = 386,263,108.28/28,706.76
  6. Step 6: Final answer
    x = 13,455.48

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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.