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Finding the Fourth Proportional to 18,485.71, 27,728.14 and 5,158.35

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Solution

The fourth proportional to 18,485.71, 27,728.14 and 5,158.35 is: 7,737.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,485.71 : 27,728.14 = 5,158.35 : x
  2. Step 2: Convert to fraction form
    18,485.71/27,728.14 = 5,158.35/x
  3. Step 3: Cross multiply
    18,485.71x = 27,728.14 × 5,158.35
  4. Step 4: Simplify right side
    18,485.71x = 143,031,450.97
  5. Step 5: Solve for x
    x = 143,031,450.97/18,485.71
  6. Step 6: Final answer
    x = 7,737.41

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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.