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Finding the Fourth Proportional to 19,619.78, 29,431.74 and 6,472.22

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Solution

The fourth proportional to 19,619.78, 29,431.74 and 6,472.22 is: 9,709.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,619.78 : 29,431.74 = 6,472.22 : x
  2. Step 2: Convert to fraction form
    19,619.78/29,431.74 = 6,472.22/x
  3. Step 3: Cross multiply
    19,619.78x = 29,431.74 × 6,472.22
  4. Step 4: Simplify right side
    19,619.78x = 190,488,696.26
  5. Step 5: Solve for x
    x = 190,488,696.26/19,619.78
  6. Step 6: Final answer
    x = 9,709.01

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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.