Home / 21,020,442.78-31,515,524.64-12,916,672.86

Finding the Fourth Proportional to 21,020,442.78, 31,515,524.64 and 12,916,672.86

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Solution

The fourth proportional to 21,020,442.78, 31,515,524.64 and 12,916,672.86 is: 19,365,706.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,020,442.78 : 31,515,524.64 = 12,916,672.86 : x
  2. Step 2: Convert to fraction form
    21,020,442.78/31,515,524.64 = 12,916,672.86/x
  3. Step 3: Cross multiply
    21,020,442.78x = 31,515,524.64 × 12,916,672.86
  4. Step 4: Simplify right side
    21,020,442.78x = 407,075,721,786,149.25
  5. Step 5: Solve for x
    x = 407,075,721,786,149.25/21,020,442.78
  6. Step 6: Final answer
    x = 19,365,706.33

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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.