Home / 21,350,977.76-31,995,795.72-12,136,270.88

Finding the Fourth Proportional to 21,350,977.76, 31,995,795.72 and 12,136,270.88

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Solution

The fourth proportional to 21,350,977.76, 31,995,795.72 and 12,136,270.88 is: 18,186,972.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,350,977.76 : 31,995,795.72 = 12,136,270.88 : x
  2. Step 2: Convert to fraction form
    21,350,977.76/31,995,795.72 = 12,136,270.88/x
  3. Step 3: Cross multiply
    21,350,977.76x = 31,995,795.72 × 12,136,270.88
  4. Step 4: Simplify right side
    21,350,977.76x = 388,309,643,879,064.62
  5. Step 5: Solve for x
    x = 388,309,643,879,064.62/21,350,977.76
  6. Step 6: Final answer
    x = 18,186,972.43

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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.