Home / 7,139.63-9,852.69-3,953.09

Finding the Fourth Proportional to 7,139.63, 9,852.69 and 3,953.09

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Solution

The fourth proportional to 7,139.63, 9,852.69 and 3,953.09 is: 5,455.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.63 : 9,852.69 = 3,953.09 : x
  2. Step 2: Convert to fraction form
    7,139.63/9,852.69 = 3,953.09/x
  3. Step 3: Cross multiply
    7,139.63x = 9,852.69 × 3,953.09
  4. Step 4: Simplify right side
    7,139.63x = 38,948,521.05
  5. Step 5: Solve for x
    x = 38,948,521.05/7,139.63
  6. Step 6: Final answer
    x = 5,455.26

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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.