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Finding the Fourth Proportional to 7,139.51, 9,852.53 and 3,995.70

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Solution

The fourth proportional to 7,139.51, 9,852.53 and 3,995.70 is: 5,514.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.51 : 9,852.53 = 3,995.70 : x
  2. Step 2: Convert to fraction form
    7,139.51/9,852.53 = 3,995.70/x
  3. Step 3: Cross multiply
    7,139.51x = 9,852.53 × 3,995.70
  4. Step 4: Simplify right side
    7,139.51x = 39,367,754.12
  5. Step 5: Solve for x
    x = 39,367,754.12/7,139.51
  6. Step 6: Final answer
    x = 5,514.07

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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.