Home / 12,131,990.20-18,197,985.30-11,208,201.40

Finding the Fourth Proportional to 12,131,990.20, 18,197,985.30 and 11,208,201.40

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Solution

The fourth proportional to 12,131,990.20, 18,197,985.30 and 11,208,201.40 is: 16,812,302.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,131,990.20 : 18,197,985.30 = 11,208,201.40 : x
  2. Step 2: Convert to fraction form
    12,131,990.20/18,197,985.30 = 11,208,201.40/x
  3. Step 3: Cross multiply
    12,131,990.20x = 18,197,985.30 × 11,208,201.40
  4. Step 4: Simplify right side
    12,131,990.20x = 203,966,684,316,639.44
  5. Step 5: Solve for x
    x = 203,966,684,316,639.44/12,131,990.20
  6. Step 6: Final answer
    x = 16,812,302.10

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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.