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Finding the Fourth Proportional to 30,893.86, 42,608.14 and 18,948.79

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Solution

The fourth proportional to 30,893.86, 42,608.14 and 18,948.79 is: 26,133.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,893.86 : 42,608.14 = 18,948.79 : x
  2. Step 2: Convert to fraction form
    30,893.86/42,608.14 = 18,948.79/x
  3. Step 3: Cross multiply
    30,893.86x = 42,608.14 × 18,948.79
  4. Step 4: Simplify right side
    30,893.86x = 807,372,697.15
  5. Step 5: Solve for x
    x = 807,372,697.15/30,893.86
  6. Step 6: Final answer
    x = 26,133.76

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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.