Home / 12,128,521.70-18,192,782.55-11,969,089.40

Finding the Fourth Proportional to 12,128,521.70, 18,192,782.55 and 11,969,089.40

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Solution

The fourth proportional to 12,128,521.70, 18,192,782.55 and 11,969,089.40 is: 17,953,634.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128,521.70 : 18,192,782.55 = 11,969,089.40 : x
  2. Step 2: Convert to fraction form
    12,128,521.70/18,192,782.55 = 11,969,089.40/x
  3. Step 3: Cross multiply
    12,128,521.70x = 18,192,782.55 × 11,969,089.40
  4. Step 4: Simplify right side
    12,128,521.70x = 217,751,040,775,710
  5. Step 5: Solve for x
    x = 217,751,040,775,710/12,128,521.70
  6. Step 6: Final answer
    x = 17,953,634.10

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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.