Home / 28,990,647.70-40,007,119.57-15,938,128.69

Finding the Fourth Proportional to 28,990,647.70, 40,007,119.57 and 15,938,128.69

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Solution

The fourth proportional to 28,990,647.70, 40,007,119.57 and 15,938,128.69 is: 21,994,631.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,990,647.70 : 40,007,119.57 = 15,938,128.69 : x
  2. Step 2: Convert to fraction form
    28,990,647.70/40,007,119.57 = 15,938,128.69/x
  3. Step 3: Cross multiply
    28,990,647.70x = 40,007,119.57 × 15,938,128.69
  4. Step 4: Simplify right side
    28,990,647.70x = 637,638,620,283,050
  5. Step 5: Solve for x
    x = 637,638,620,283,050/28,990,647.70
  6. Step 6: Final answer
    x = 21,994,631.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.