Home / 12,621.40-18,931.41-3,855.63

Finding the Fourth Proportional to 12,621.40, 18,931.41 and 3,855.63

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Solution

The fourth proportional to 12,621.40, 18,931.41 and 3,855.63 is: 5,783.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,621.40 : 18,931.41 = 3,855.63 : x
  2. Step 2: Convert to fraction form
    12,621.40/18,931.41 = 3,855.63/x
  3. Step 3: Cross multiply
    12,621.40x = 18,931.41 × 3,855.63
  4. Step 4: Simplify right side
    12,621.40x = 72,992,512.34
  5. Step 5: Solve for x
    x = 72,992,512.34/12,621.40
  6. Step 6: Final answer
    x = 5,783.23

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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.