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Finding the Fourth Proportional to 7,149, 9,865.62 and 4,005.26

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Solution

The fourth proportional to 7,149, 9,865.62 and 4,005.26 is: 5,527.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,149 : 9,865.62 = 4,005.26 : x
  2. Step 2: Convert to fraction form
    7,149/9,865.62 = 4,005.26/x
  3. Step 3: Cross multiply
    7,149x = 9,865.62 × 4,005.26
  4. Step 4: Simplify right side
    7,149x = 39,514,323.83
  5. Step 5: Solve for x
    x = 39,514,323.83/7,149
  6. Step 6: Final answer
    x = 5,527.25

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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.