Home / 21,292,767.60-31,939,151.40-12,782,713.20

Finding the Fourth Proportional to 21,292,767.60, 31,939,151.40 and 12,782,713.20

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Solution

The fourth proportional to 21,292,767.60, 31,939,151.40 and 12,782,713.20 is: 19,174,069.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,292,767.60 : 31,939,151.40 = 12,782,713.20 : x
  2. Step 2: Convert to fraction form
    21,292,767.60/31,939,151.40 = 12,782,713.20/x
  3. Step 3: Cross multiply
    21,292,767.60x = 31,939,151.40 × 12,782,713.20
  4. Step 4: Simplify right side
    21,292,767.60x = 408,269,012,197,578.44
  5. Step 5: Solve for x
    x = 408,269,012,197,578.44/21,292,767.60
  6. Step 6: Final answer
    x = 19,174,069.80

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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.