Home / 12,618,672.40-18,928,008.60-7,831,766.80

Finding the Fourth Proportional to 12,618,672.40, 18,928,008.60 and 7,831,766.80

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Solution

The fourth proportional to 12,618,672.40, 18,928,008.60 and 7,831,766.80 is: 11,747,650.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,618,672.40 : 18,928,008.60 = 7,831,766.80 : x
  2. Step 2: Convert to fraction form
    12,618,672.40/18,928,008.60 = 7,831,766.80/x
  3. Step 3: Cross multiply
    12,618,672.40x = 18,928,008.60 × 7,831,766.80
  4. Step 4: Simplify right side
    12,618,672.40x = 148,239,749,343,594.50
  5. Step 5: Solve for x
    x = 148,239,749,343,594.50/12,618,672.40
  6. Step 6: Final answer
    x = 11,747,650.20

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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.