Home / 12,918.19-19,364.90-4,147.11

Finding the Fourth Proportional to 12,918.19, 19,364.90 and 4,147.11

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Solution

The fourth proportional to 12,918.19, 19,364.90 and 4,147.11 is: 6,216.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,918.19 : 19,364.90 = 4,147.11 : x
  2. Step 2: Convert to fraction form
    12,918.19/19,364.90 = 4,147.11/x
  3. Step 3: Cross multiply
    12,918.19x = 19,364.90 × 4,147.11
  4. Step 4: Simplify right side
    12,918.19x = 80,308,370.44
  5. Step 5: Solve for x
    x = 80,308,370.44/12,918.19
  6. Step 6: Final answer
    x = 6,216.69

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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.