Home / 20,138,643.80-30,207,965.70-12,485,893.40

Finding the Fourth Proportional to 20,138,643.80, 30,207,965.70 and 12,485,893.40

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Solution

The fourth proportional to 20,138,643.80, 30,207,965.70 and 12,485,893.40 is: 18,728,840.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138,643.80 : 30,207,965.70 = 12,485,893.40 : x
  2. Step 2: Convert to fraction form
    20,138,643.80/30,207,965.70 = 12,485,893.40/x
  3. Step 3: Cross multiply
    20,138,643.80x = 30,207,965.70 × 12,485,893.40
  4. Step 4: Simplify right side
    20,138,643.80x = 377,173,439,561,056.38
  5. Step 5: Solve for x
    x = 377,173,439,561,056.38/20,138,643.80
  6. Step 6: Final answer
    x = 18,728,840.10

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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.