Home / 12,618,904.90-18,928,357.35-7,831,999.30

Finding the Fourth Proportional to 12,618,904.90, 18,928,357.35 and 7,831,999.30

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Solution

The fourth proportional to 12,618,904.90, 18,928,357.35 and 7,831,999.30 is: 11,747,998.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,618,904.90 : 18,928,357.35 = 7,831,999.30 : x
  2. Step 2: Convert to fraction form
    12,618,904.90/18,928,357.35 = 7,831,999.30/x
  3. Step 3: Cross multiply
    12,618,904.90x = 18,928,357.35 × 7,831,999.30
  4. Step 4: Simplify right side
    12,618,904.90x = 148,246,881,515,349.88
  5. Step 5: Solve for x
    x = 148,246,881,515,349.88/12,618,904.90
  6. Step 6: Final answer
    x = 11,747,998.95

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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.