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Finding the Fourth Proportional to 18,974.30, 28,471.74 and 7,888.64

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Solution

The fourth proportional to 18,974.30, 28,471.74 and 7,888.64 is: 11,837.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,974.30 : 28,471.74 = 7,888.64 : x
  2. Step 2: Convert to fraction form
    18,974.30/28,471.74 = 7,888.64/x
  3. Step 3: Cross multiply
    18,974.30x = 28,471.74 × 7,888.64
  4. Step 4: Simplify right side
    18,974.30x = 224,603,307.03
  5. Step 5: Solve for x
    x = 224,603,307.03/18,974.30
  6. Step 6: Final answer
    x = 11,837.24

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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.