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Finding the Fourth Proportional to 7,708, 10,632.72 and 4,725.28

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Solution

The fourth proportional to 7,708, 10,632.72 and 4,725.28 is: 6,518.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,708 : 10,632.72 = 4,725.28 : x
  2. Step 2: Convert to fraction form
    7,708/10,632.72 = 4,725.28/x
  3. Step 3: Cross multiply
    7,708x = 10,632.72 × 4,725.28
  4. Step 4: Simplify right side
    7,708x = 50,242,579.16
  5. Step 5: Solve for x
    x = 50,242,579.16/7,708
  6. Step 6: Final answer
    x = 6,518.24

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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.