Home / 21,783.82-30,061.69-12,222.39

Finding the Fourth Proportional to 21,783.82, 30,061.69 and 12,222.39

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Solution

The fourth proportional to 21,783.82, 30,061.69 and 12,222.39 is: 16,866.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,783.82 : 30,061.69 = 12,222.39 : x
  2. Step 2: Convert to fraction form
    21,783.82/30,061.69 = 12,222.39/x
  3. Step 3: Cross multiply
    21,783.82x = 30,061.69 × 12,222.39
  4. Step 4: Simplify right side
    21,783.82x = 367,425,867.35
  5. Step 5: Solve for x
    x = 367,425,867.35/21,783.82
  6. Step 6: Final answer
    x = 16,866.91

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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.