Home / 7,139.40-9,852.37-3,995.59

Finding the Fourth Proportional to 7,139.40, 9,852.37 and 3,995.59

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Solution

The fourth proportional to 7,139.40, 9,852.37 and 3,995.59 is: 5,513.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.40 : 9,852.37 = 3,995.59 : x
  2. Step 2: Convert to fraction form
    7,139.40/9,852.37 = 3,995.59/x
  3. Step 3: Cross multiply
    7,139.40x = 9,852.37 × 3,995.59
  4. Step 4: Simplify right side
    7,139.40x = 39,366,031.05
  5. Step 5: Solve for x
    x = 39,366,031.05/7,139.40
  6. Step 6: Final answer
    x = 5,513.91

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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.