Home / 30,960.18-42,724.66-16,813.12

Finding the Fourth Proportional to 30,960.18, 42,724.66 and 16,813.12

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Solution

The fourth proportional to 30,960.18, 42,724.66 and 16,813.12 is: 23,201.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,960.18 : 42,724.66 = 16,813.12 : x
  2. Step 2: Convert to fraction form
    30,960.18/42,724.66 = 16,813.12/x
  3. Step 3: Cross multiply
    30,960.18x = 42,724.66 × 16,813.12
  4. Step 4: Simplify right side
    30,960.18x = 718,334,835.54
  5. Step 5: Solve for x
    x = 718,334,835.54/30,960.18
  6. Step 6: Final answer
    x = 23,201.89

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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.