Home / 7,128.58-9,837.34-3,984.76

Finding the Fourth Proportional to 7,128.58, 9,837.34 and 3,984.76

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Solution

The fourth proportional to 7,128.58, 9,837.34 and 3,984.76 is: 5,498.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.58 : 9,837.34 = 3,984.76 : x
  2. Step 2: Convert to fraction form
    7,128.58/9,837.34 = 3,984.76/x
  3. Step 3: Cross multiply
    7,128.58x = 9,837.34 × 3,984.76
  4. Step 4: Simplify right side
    7,128.58x = 39,199,438.94
  5. Step 5: Solve for x
    x = 39,199,438.94/7,128.58
  6. Step 6: Final answer
    x = 5,498.91

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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.