Home / 12,618.90-18,928.35-3,853.80

Finding the Fourth Proportional to 12,618.90, 18,928.35 and 3,853.80

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Solution

The fourth proportional to 12,618.90, 18,928.35 and 3,853.80 is: 5,780.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,618.90 : 18,928.35 = 3,853.80 : x
  2. Step 2: Convert to fraction form
    12,618.90/18,928.35 = 3,853.80/x
  3. Step 3: Cross multiply
    12,618.90x = 18,928.35 × 3,853.80
  4. Step 4: Simplify right side
    12,618.90x = 72,946,075.23
  5. Step 5: Solve for x
    x = 72,946,075.23/12,618.90
  6. Step 6: Final answer
    x = 5,780.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.