Home / 12,113.08-18,138.47-6,840.21

Finding the Fourth Proportional to 12,113.08, 18,138.47 and 6,840.21

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Solution

The fourth proportional to 12,113.08, 18,138.47 and 6,840.21 is: 10,242.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,113.08 : 18,138.47 = 6,840.21 : x
  2. Step 2: Convert to fraction form
    12,113.08/18,138.47 = 6,840.21/x
  3. Step 3: Cross multiply
    12,113.08x = 18,138.47 × 6,840.21
  4. Step 4: Simplify right side
    12,113.08x = 124,070,977.70
  5. Step 5: Solve for x
    x = 124,070,977.70/12,113.08
  6. Step 6: Final answer
    x = 10,242.73

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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.