Home / 21,855.87-30,161.06-12,295.77

Finding the Fourth Proportional to 21,855.87, 30,161.06 and 12,295.77

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Solution

The fourth proportional to 21,855.87, 30,161.06 and 12,295.77 is: 16,968.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,855.87 : 30,161.06 = 12,295.77 : x
  2. Step 2: Convert to fraction form
    21,855.87/30,161.06 = 12,295.77/x
  3. Step 3: Cross multiply
    21,855.87x = 30,161.06 × 12,295.77
  4. Step 4: Simplify right side
    21,855.87x = 370,853,395.24
  5. Step 5: Solve for x
    x = 370,853,395.24/21,855.87
  6. Step 6: Final answer
    x = 16,968.14

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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.