Home / 21,750.79-30,018.17-12,190.63

Finding the Fourth Proportional to 21,750.79, 30,018.17 and 12,190.63

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Solution

The fourth proportional to 21,750.79, 30,018.17 and 12,190.63 is: 16,824.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,750.79 : 30,018.17 = 12,190.63 : x
  2. Step 2: Convert to fraction form
    21,750.79/30,018.17 = 12,190.63/x
  3. Step 3: Cross multiply
    21,750.79x = 30,018.17 × 12,190.63
  4. Step 4: Simplify right side
    21,750.79x = 365,940,403.75
  5. Step 5: Solve for x
    x = 365,940,403.75/21,750.79
  6. Step 6: Final answer
    x = 16,824.24

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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.