Home / 20,507,508.80-30,728,085.60-12,920,897.60

Finding the Fourth Proportional to 20,507,508.80, 30,728,085.60 and 12,920,897.60

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Solution

The fourth proportional to 20,507,508.80, 30,728,085.60 and 12,920,897.60 is: 19,360,442.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,507,508.80 : 30,728,085.60 = 12,920,897.60 : x
  2. Step 2: Convert to fraction form
    20,507,508.80/30,728,085.60 = 12,920,897.60/x
  3. Step 3: Cross multiply
    20,507,508.80x = 30,728,085.60 × 12,920,897.60
  4. Step 4: Simplify right side
    20,507,508.80x = 397,034,447,481,634.56
  5. Step 5: Solve for x
    x = 397,034,447,481,634.56/20,507,508.80
  6. Step 6: Final answer
    x = 19,360,442.62

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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.