Home / 12,128,436.70-18,192,655.05-11,969,004.40

Finding the Fourth Proportional to 12,128,436.70, 18,192,655.05 and 11,969,004.40

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Solution

The fourth proportional to 12,128,436.70, 18,192,655.05 and 11,969,004.40 is: 17,953,506.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128,436.70 : 18,192,655.05 = 11,969,004.40 : x
  2. Step 2: Convert to fraction form
    12,128,436.70/18,192,655.05 = 11,969,004.40/x
  3. Step 3: Cross multiply
    12,128,436.70x = 18,192,655.05 × 11,969,004.40
  4. Step 4: Simplify right side
    12,128,436.70x = 217,747,968,341,132.25
  5. Step 5: Solve for x
    x = 217,747,968,341,132.25/12,128,436.70
  6. Step 6: Final answer
    x = 17,953,506.60

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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.