Home / 12,618,904.40-18,928,356.60-7,831,998.80

Finding the Fourth Proportional to 12,618,904.40, 18,928,356.60 and 7,831,998.80

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Solution

The fourth proportional to 12,618,904.40, 18,928,356.60 and 7,831,998.80 is: 11,747,998.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,618,904.40 : 18,928,356.60 = 7,831,998.80 : x
  2. Step 2: Convert to fraction form
    12,618,904.40/18,928,356.60 = 7,831,998.80/x
  3. Step 3: Cross multiply
    12,618,904.40x = 18,928,356.60 × 7,831,998.80
  4. Step 4: Simplify right side
    12,618,904.40x = 148,246,866,177,172.09
  5. Step 5: Solve for x
    x = 148,246,866,177,172.09/12,618,904.40
  6. Step 6: Final answer
    x = 11,747,998.20

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1.5x scale

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.