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Finding the Fourth Proportional to 5,391.30, 7,421.04 and 4,822.68

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Solution

The fourth proportional to 5,391.30, 7,421.04 and 4,822.68 is: 6,638.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,391.30 : 7,421.04 = 4,822.68 : x
  2. Step 2: Convert to fraction form
    5,391.30/7,421.04 = 4,822.68/x
  3. Step 3: Cross multiply
    5,391.30x = 7,421.04 × 4,822.68
  4. Step 4: Simplify right side
    5,391.30x = 35,789,301.19
  5. Step 5: Solve for x
    x = 35,789,301.19/5,391.30
  6. Step 6: Final answer
    x = 6,638.34

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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.