Home / 19,309.89-28,944.14-12,643.86

Finding the Fourth Proportional to 19,309.89, 28,944.14 and 12,643.86

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Solution

The fourth proportional to 19,309.89, 28,944.14 and 12,643.86 is: 18,952.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,309.89 : 28,944.14 = 12,643.86 : x
  2. Step 2: Convert to fraction form
    19,309.89/28,944.14 = 12,643.86/x
  3. Step 3: Cross multiply
    19,309.89x = 28,944.14 × 12,643.86
  4. Step 4: Simplify right side
    19,309.89x = 365,965,590.76
  5. Step 5: Solve for x
    x = 365,965,590.76/19,309.89
  6. Step 6: Final answer
    x = 18,952.24

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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.