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Finding the Fourth Proportional to 6,872.81, 9,483.90 and 4,040.28

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Solution

The fourth proportional to 6,872.81, 9,483.90 and 4,040.28 is: 5,575.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,872.81 : 9,483.90 = 4,040.28 : x
  2. Step 2: Convert to fraction form
    6,872.81/9,483.90 = 4,040.28/x
  3. Step 3: Cross multiply
    6,872.81x = 9,483.90 × 4,040.28
  4. Step 4: Simplify right side
    6,872.81x = 38,317,564.07
  5. Step 5: Solve for x
    x = 38,317,564.07/6,872.81
  6. Step 6: Final answer
    x = 5,575.24

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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.