Home / 12,128,513.20-18,192,769.80-11,969,080.90

Finding the Fourth Proportional to 12,128,513.20, 18,192,769.80 and 11,969,080.90

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Solution

The fourth proportional to 12,128,513.20, 18,192,769.80 and 11,969,080.90 is: 17,953,621.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128,513.20 : 18,192,769.80 = 11,969,080.90 : x
  2. Step 2: Convert to fraction form
    12,128,513.20/18,192,769.80 = 11,969,080.90/x
  3. Step 3: Cross multiply
    12,128,513.20x = 18,192,769.80 × 11,969,080.90
  4. Step 4: Simplify right side
    12,128,513.20x = 217,750,733,531,276.84
  5. Step 5: Solve for x
    x = 217,750,733,531,276.84/12,128,513.20
  6. Step 6: Final answer
    x = 17,953,621.35

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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.