Home / 21,231,029.40-31,846,544.10-12,706,978.20

Finding the Fourth Proportional to 21,231,029.40, 31,846,544.10 and 12,706,978.20

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Solution

The fourth proportional to 21,231,029.40, 31,846,544.10 and 12,706,978.20 is: 19,060,467.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,231,029.40 : 31,846,544.10 = 12,706,978.20 : x
  2. Step 2: Convert to fraction form
    21,231,029.40/31,846,544.10 = 12,706,978.20/x
  3. Step 3: Cross multiply
    21,231,029.40x = 31,846,544.10 × 12,706,978.20
  4. Step 4: Simplify right side
    21,231,029.40x = 404,673,341,624,038.62
  5. Step 5: Solve for x
    x = 404,673,341,624,038.62/21,231,029.40
  6. Step 6: Final answer
    x = 19,060,467.30

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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.