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Finding the Fourth Proportional to 7,139.84, 9,852.80 and 3,995.84

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Solution

The fourth proportional to 7,139.84, 9,852.80 and 3,995.84 is: 5,514.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.84 : 9,852.80 = 3,995.84 : x
  2. Step 2: Convert to fraction form
    7,139.84/9,852.80 = 3,995.84/x
  3. Step 3: Cross multiply
    7,139.84x = 9,852.80 × 3,995.84
  4. Step 4: Simplify right side
    7,139.84x = 39,370,212.35
  5. Step 5: Solve for x
    x = 39,370,212.35/7,139.84
  6. Step 6: Final answer
    x = 5,514.16

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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.