Home / 21,795.86-30,078.87-12,365.84

Finding the Fourth Proportional to 21,795.86, 30,078.87 and 12,365.84

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Solution

The fourth proportional to 21,795.86, 30,078.87 and 12,365.84 is: 17,065.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,795.86 : 30,078.87 = 12,365.84 : x
  2. Step 2: Convert to fraction form
    21,795.86/30,078.87 = 12,365.84/x
  3. Step 3: Cross multiply
    21,795.86x = 30,078.87 × 12,365.84
  4. Step 4: Simplify right side
    21,795.86x = 371,950,493.80
  5. Step 5: Solve for x
    x = 371,950,493.80/21,795.86
  6. Step 6: Final answer
    x = 17,065.19

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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.