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Finding the Fourth Proportional to 19,492.56, 29,241.99 and 7,639.91

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Solution

The fourth proportional to 19,492.56, 29,241.99 and 7,639.91 is: 11,461.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,492.56 : 29,241.99 = 7,639.91 : x
  2. Step 2: Convert to fraction form
    19,492.56/29,241.99 = 7,639.91/x
  3. Step 3: Cross multiply
    19,492.56x = 29,241.99 × 7,639.91
  4. Step 4: Simplify right side
    19,492.56x = 223,406,171.82
  5. Step 5: Solve for x
    x = 223,406,171.82/19,492.56
  6. Step 6: Final answer
    x = 11,461.10

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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.