Home / 21,106,420.75-31,665,089.37-12,360,085.12

Finding the Fourth Proportional to 21,106,420.75, 31,665,089.37 and 12,360,085.12

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Solution

The fourth proportional to 21,106,420.75, 31,665,089.37 and 12,360,085.12 is: 18,543,324.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,106,420.75 : 31,665,089.37 = 12,360,085.12 : x
  2. Step 2: Convert to fraction form
    21,106,420.75/31,665,089.37 = 12,360,085.12/x
  3. Step 3: Cross multiply
    21,106,420.75x = 31,665,089.37 × 12,360,085.12
  4. Step 4: Simplify right side
    21,106,420.75x = 391,383,199,945,607.19
  5. Step 5: Solve for x
    x = 391,383,199,945,607.19/21,106,420.75
  6. Step 6: Final answer
    x = 18,543,324.07

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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.