Home / 30,517.75-42,112.47-16,905.70

Finding the Fourth Proportional to 30,517.75, 42,112.47 and 16,905.70

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Solution

The fourth proportional to 30,517.75, 42,112.47 and 16,905.70 is: 23,328.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,517.75 : 42,112.47 = 16,905.70 : x
  2. Step 2: Convert to fraction form
    30,517.75/42,112.47 = 16,905.70/x
  3. Step 3: Cross multiply
    30,517.75x = 42,112.47 × 16,905.70
  4. Step 4: Simplify right side
    30,517.75x = 711,940,784.08
  5. Step 5: Solve for x
    x = 711,940,784.08/30,517.75
  6. Step 6: Final answer
    x = 23,328.74

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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.