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Finding the Fourth Proportional to 5,428.20, 8,153.22 and 5,275.08

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Solution

The fourth proportional to 5,428.20, 8,153.22 and 5,275.08 is: 7,923.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.20 : 8,153.22 = 5,275.08 : x
  2. Step 2: Convert to fraction form
    5,428.20/8,153.22 = 5,275.08/x
  3. Step 3: Cross multiply
    5,428.20x = 8,153.22 × 5,275.08
  4. Step 4: Simplify right side
    5,428.20x = 43,008,887.76
  5. Step 5: Solve for x
    x = 43,008,887.76/5,428.20
  6. Step 6: Final answer
    x = 7,923.23

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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.