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Finding the Fourth Proportional to 19,872.77, 29,816.42 and 18,699.08

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Solution

The fourth proportional to 19,872.77, 29,816.42 and 18,699.08 is: 28,055.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,872.77 : 29,816.42 = 18,699.08 : x
  2. Step 2: Convert to fraction form
    19,872.77/29,816.42 = 18,699.08/x
  3. Step 3: Cross multiply
    19,872.77x = 29,816.42 × 18,699.08
  4. Step 4: Simplify right side
    19,872.77x = 557,539,380.32
  5. Step 5: Solve for x
    x = 557,539,380.32/19,872.77
  6. Step 6: Final answer
    x = 28,055.45

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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.