Home / 19,119.10-28,678.62-12,543.72

Finding the Fourth Proportional to 19,119.10, 28,678.62 and 12,543.72

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Solution

The fourth proportional to 19,119.10, 28,678.62 and 12,543.72 is: 18,815.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,119.10 : 28,678.62 = 12,543.72 : x
  2. Step 2: Convert to fraction form
    19,119.10/28,678.62 = 12,543.72/x
  3. Step 3: Cross multiply
    19,119.10x = 28,678.62 × 12,543.72
  4. Step 4: Simplify right side
    19,119.10x = 359,736,579.27
  5. Step 5: Solve for x
    x = 359,736,579.27/19,119.10
  6. Step 6: Final answer
    x = 18,815.56

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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.