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Finding the Fourth Proportional to 5,389.63, 7,435.62 and 3,976.68

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Solution

The fourth proportional to 5,389.63, 7,435.62 and 3,976.68 is: 5,486.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,389.63 : 7,435.62 = 3,976.68 : x
  2. Step 2: Convert to fraction form
    5,389.63/7,435.62 = 3,976.68/x
  3. Step 3: Cross multiply
    5,389.63x = 7,435.62 × 3,976.68
  4. Step 4: Simplify right side
    5,389.63x = 29,569,094.31
  5. Step 5: Solve for x
    x = 29,569,094.31/5,389.63
  6. Step 6: Final answer
    x = 5,486.30

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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.