Home / 12,815,999.40-19,223,999.10-11,969,970.60

Finding the Fourth Proportional to 12,815,999.40, 19,223,999.10 and 11,969,970.60

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Solution

The fourth proportional to 12,815,999.40, 19,223,999.10 and 11,969,970.60 is: 17,954,955.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,815,999.40 : 19,223,999.10 = 11,969,970.60 : x
  2. Step 2: Convert to fraction form
    12,815,999.40/19,223,999.10 = 11,969,970.60/x
  3. Step 3: Cross multiply
    12,815,999.40x = 19,223,999.10 × 11,969,970.60
  4. Step 4: Simplify right side
    12,815,999.40x = 230,110,704,041,426.47
  5. Step 5: Solve for x
    x = 230,110,704,041,426.47/12,815,999.40
  6. Step 6: Final answer
    x = 17,954,955.90

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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.