Home / 21,790.86-30,069.62-12,360.30

Finding the Fourth Proportional to 21,790.86, 30,069.62 and 12,360.30

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Solution

The fourth proportional to 21,790.86, 30,069.62 and 12,360.30 is: 17,056.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,790.86 : 30,069.62 = 12,360.30 : x
  2. Step 2: Convert to fraction form
    21,790.86/30,069.62 = 12,360.30/x
  3. Step 3: Cross multiply
    21,790.86x = 30,069.62 × 12,360.30
  4. Step 4: Simplify right side
    21,790.86x = 371,669,524.09
  5. Step 5: Solve for x
    x = 371,669,524.09/21,790.86
  6. Step 6: Final answer
    x = 17,056.21

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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.