Home / 6,890.47-9,507.28-3,905.62

Finding the Fourth Proportional to 6,890.47, 9,507.28 and 3,905.62

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Solution

The fourth proportional to 6,890.47, 9,507.28 and 3,905.62 is: 5,388.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,890.47 : 9,507.28 = 3,905.62 : x
  2. Step 2: Convert to fraction form
    6,890.47/9,507.28 = 3,905.62/x
  3. Step 3: Cross multiply
    6,890.47x = 9,507.28 × 3,905.62
  4. Step 4: Simplify right side
    6,890.47x = 37,131,822.91
  5. Step 5: Solve for x
    x = 37,131,822.91/6,890.47
  6. Step 6: Final answer
    x = 5,388.87

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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.