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Finding the Fourth Proportional to 28,141.62, 38,813.79 and 19,641.02

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Solution

The fourth proportional to 28,141.62, 38,813.79 and 19,641.02 is: 27,089.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,141.62 : 38,813.79 = 19,641.02 : x
  2. Step 2: Convert to fraction form
    28,141.62/38,813.79 = 19,641.02/x
  3. Step 3: Cross multiply
    28,141.62x = 38,813.79 × 19,641.02
  4. Step 4: Simplify right side
    28,141.62x = 762,342,425.67
  5. Step 5: Solve for x
    x = 762,342,425.67/28,141.62
  6. Step 6: Final answer
    x = 27,089.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.