Home / 18,712,968.30-28,079,950.05-7,928,433.90

Finding the Fourth Proportional to 18,712,968.30, 28,079,950.05 and 7,928,433.90

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Solution

The fourth proportional to 18,712,968.30, 28,079,950.05 and 7,928,433.90 is: 11,897,098.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712,968.30 : 28,079,950.05 = 7,928,433.90 : x
  2. Step 2: Convert to fraction form
    18,712,968.30/28,079,950.05 = 7,928,433.90/x
  3. Step 3: Cross multiply
    18,712,968.30x = 28,079,950.05 × 7,928,433.90
  4. Step 4: Simplify right side
    18,712,968.30x = 222,630,027,886,726.72
  5. Step 5: Solve for x
    x = 222,630,027,886,726.72/18,712,968.30
  6. Step 6: Final answer
    x = 11,897,098.54

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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.