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Finding the Fourth Proportional to 5,430.90, 8,130.90 and 3,576.42

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Solution

The fourth proportional to 5,430.90, 8,130.90 and 3,576.42 is: 5,354.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,430.90 : 8,130.90 = 3,576.42 : x
  2. Step 2: Convert to fraction form
    5,430.90/8,130.90 = 3,576.42/x
  3. Step 3: Cross multiply
    5,430.90x = 8,130.90 × 3,576.42
  4. Step 4: Simplify right side
    5,430.90x = 29,079,513.38
  5. Step 5: Solve for x
    x = 29,079,513.38/5,430.90
  6. Step 6: Final answer
    x = 5,354.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.