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Finding the Fourth Proportional to 19,618.83, 29,419.02 and 7,130.05

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Solution

The fourth proportional to 19,618.83, 29,419.02 and 7,130.05 is: 10,691.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,618.83 : 29,419.02 = 7,130.05 : x
  2. Step 2: Convert to fraction form
    19,618.83/29,419.02 = 7,130.05/x
  3. Step 3: Cross multiply
    19,618.83x = 29,419.02 × 7,130.05
  4. Step 4: Simplify right side
    19,618.83x = 209,759,010.00
  5. Step 5: Solve for x
    x = 209,759,010.00/19,618.83
  6. Step 6: Final answer
    x = 10,691.72

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.