Home / 12,943.40-19,415.10-12,338.60

Finding the Fourth Proportional to 12,943.40, 19,415.10 and 12,338.60

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Solution

The fourth proportional to 12,943.40, 19,415.10 and 12,338.60 is: 18,507.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,943.40 : 19,415.10 = 12,338.60 : x
  2. Step 2: Convert to fraction form
    12,943.40/19,415.10 = 12,338.60/x
  3. Step 3: Cross multiply
    12,943.40x = 19,415.10 × 12,338.60
  4. Step 4: Simplify right side
    12,943.40x = 239,555,152.86
  5. Step 5: Solve for x
    x = 239,555,152.86/12,943.40
  6. Step 6: Final answer
    x = 18,507.90

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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.