Home / 21,945.60-30,280.32-13,984.56

Finding the Fourth Proportional to 21,945.60, 30,280.32 and 13,984.56

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Solution

The fourth proportional to 21,945.60, 30,280.32 and 13,984.56 is: 19,295.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,945.60 : 30,280.32 = 13,984.56 : x
  2. Step 2: Convert to fraction form
    21,945.60/30,280.32 = 13,984.56/x
  3. Step 3: Cross multiply
    21,945.60x = 30,280.32 × 13,984.56
  4. Step 4: Simplify right side
    21,945.60x = 423,456,951.86
  5. Step 5: Solve for x
    x = 423,456,951.86/21,945.60
  6. Step 6: Final answer
    x = 19,295.76

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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.