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Finding the Fourth Proportional to 30,684.56, 42,372.42 and 19,374.08

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Solution

The fourth proportional to 30,684.56, 42,372.42 and 19,374.08 is: 26,753.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,684.56 : 42,372.42 = 19,374.08 : x
  2. Step 2: Convert to fraction form
    30,684.56/42,372.42 = 19,374.08/x
  3. Step 3: Cross multiply
    30,684.56x = 42,372.42 × 19,374.08
  4. Step 4: Simplify right side
    30,684.56x = 820,926,654.87
  5. Step 5: Solve for x
    x = 820,926,654.87/30,684.56
  6. Step 6: Final answer
    x = 26,753.74

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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.