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Finding the Fourth Proportional to 5,488.60, 8,232.90 and 5,121.40

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Solution

The fourth proportional to 5,488.60, 8,232.90 and 5,121.40 is: 7,682.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,488.60 : 8,232.90 = 5,121.40 : x
  2. Step 2: Convert to fraction form
    5,488.60/8,232.90 = 5,121.40/x
  3. Step 3: Cross multiply
    5,488.60x = 8,232.90 × 5,121.40
  4. Step 4: Simplify right side
    5,488.60x = 42,163,974.06
  5. Step 5: Solve for x
    x = 42,163,974.06/5,488.60
  6. Step 6: Final answer
    x = 7,682.10

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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.