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Finding the Fourth Proportional to 7,957.08, 10,975.68 and 5,128.08

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Solution

The fourth proportional to 7,957.08, 10,975.68 and 5,128.08 is: 7,073.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,957.08 : 10,975.68 = 5,128.08 : x
  2. Step 2: Convert to fraction form
    7,957.08/10,975.68 = 5,128.08/x
  3. Step 3: Cross multiply
    7,957.08x = 10,975.68 × 5,128.08
  4. Step 4: Simplify right side
    7,957.08x = 56,284,165.09
  5. Step 5: Solve for x
    x = 56,284,165.09/7,957.08
  6. Step 6: Final answer
    x = 7,073.47

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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.