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Finding the Fourth Proportional to 6,428.90, 8,873.43 and 4,040.30

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Solution

The fourth proportional to 6,428.90, 8,873.43 and 4,040.30 is: 5,576.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,428.90 : 8,873.43 = 4,040.30 : x
  2. Step 2: Convert to fraction form
    6,428.90/8,873.43 = 4,040.30/x
  3. Step 3: Cross multiply
    6,428.90x = 8,873.43 × 4,040.30
  4. Step 4: Simplify right side
    6,428.90x = 35,851,319.23
  5. Step 5: Solve for x
    x = 35,851,319.23/6,428.90
  6. Step 6: Final answer
    x = 5,576.59

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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.