Home / 21,855.03-30,159.18-12,295.08

Finding the Fourth Proportional to 21,855.03, 30,159.18 and 12,295.08

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Solution

The fourth proportional to 21,855.03, 30,159.18 and 12,295.08 is: 16,966.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,855.03 : 30,159.18 = 12,295.08 : x
  2. Step 2: Convert to fraction form
    21,855.03/30,159.18 = 12,295.08/x
  3. Step 3: Cross multiply
    21,855.03x = 30,159.18 × 12,295.08
  4. Step 4: Simplify right side
    21,855.03x = 370,809,530.83
  5. Step 5: Solve for x
    x = 370,809,530.83/21,855.03
  6. Step 6: Final answer
    x = 16,966.78

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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.