Home / 28,308,028.96-42,455,022.90-12,132,145.72

Finding the Fourth Proportional to 28,308,028.96, 42,455,022.90 and 12,132,145.72

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Solution

The fourth proportional to 28,308,028.96, 42,455,022.90 and 12,132,145.72 is: 18,195,209.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,308,028.96 : 42,455,022.90 = 12,132,145.72 : x
  2. Step 2: Convert to fraction form
    28,308,028.96/42,455,022.90 = 12,132,145.72/x
  3. Step 3: Cross multiply
    28,308,028.96x = 42,455,022.90 × 12,132,145.72
  4. Step 4: Simplify right side
    28,308,028.96x = 515,070,524,368,737
  5. Step 5: Solve for x
    x = 515,070,524,368,737/28,308,028.96
  6. Step 6: Final answer
    x = 18,195,209.74

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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.