Home / 19,152.72-28,709.64-12,130.56

Finding the Fourth Proportional to 19,152.72, 28,709.64 and 12,130.56

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Solution

The fourth proportional to 19,152.72, 28,709.64 and 12,130.56 is: 18,183.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,152.72 : 28,709.64 = 12,130.56 : x
  2. Step 2: Convert to fraction form
    19,152.72/28,709.64 = 12,130.56/x
  3. Step 3: Cross multiply
    19,152.72x = 28,709.64 × 12,130.56
  4. Step 4: Simplify right side
    19,152.72x = 348,264,010.60
  5. Step 5: Solve for x
    x = 348,264,010.60/19,152.72
  6. Step 6: Final answer
    x = 18,183.53

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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.