Home / 12,312,986.40-18,469,479.60-7,778,023.20

Finding the Fourth Proportional to 12,312,986.40, 18,469,479.60 and 7,778,023.20

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Solution

The fourth proportional to 12,312,986.40, 18,469,479.60 and 7,778,023.20 is: 11,667,034.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,312,986.40 : 18,469,479.60 = 7,778,023.20 : x
  2. Step 2: Convert to fraction form
    12,312,986.40/18,469,479.60 = 7,778,023.20/x
  3. Step 3: Cross multiply
    12,312,986.40x = 18,469,479.60 × 7,778,023.20
  4. Step 4: Simplify right side
    12,312,986.40x = 143,656,040,820,726.75
  5. Step 5: Solve for x
    x = 143,656,040,820,726.75/12,312,986.40
  6. Step 6: Final answer
    x = 11,667,034.80

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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.