Home / 18,702,986.40-28,054,479.60-12,640,622.40

Finding the Fourth Proportional to 18,702,986.40, 28,054,479.60 and 12,640,622.40

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Solution

The fourth proportional to 18,702,986.40, 28,054,479.60 and 12,640,622.40 is: 18,960,933.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,702,986.40 : 28,054,479.60 = 12,640,622.40 : x
  2. Step 2: Convert to fraction form
    18,702,986.40/28,054,479.60 = 12,640,622.40/x
  3. Step 3: Cross multiply
    18,702,986.40x = 28,054,479.60 × 12,640,622.40
  4. Step 4: Simplify right side
    18,702,986.40x = 354,626,083,252,103.06
  5. Step 5: Solve for x
    x = 354,626,083,252,103.06/18,702,986.40
  6. Step 6: Final answer
    x = 18,960,933.60

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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.