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Finding the Fourth Proportional to 45,292.71, 67,917.21 and 18,990.39

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Solution

The fourth proportional to 45,292.71, 67,917.21 and 18,990.39 is: 28,476.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,292.71 : 67,917.21 = 18,990.39 : x
  2. Step 2: Convert to fraction form
    45,292.71/67,917.21 = 18,990.39/x
  3. Step 3: Cross multiply
    45,292.71x = 67,917.21 × 18,990.39
  4. Step 4: Simplify right side
    45,292.71x = 1,289,774,305.61
  5. Step 5: Solve for x
    x = 1,289,774,305.61/45,292.71
  6. Step 6: Final answer
    x = 28,476.42

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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.