Home / 18,813.93-28,221.70-7,712.81

Finding the Fourth Proportional to 18,813.93, 28,221.70 and 7,712.81

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Solution

The fourth proportional to 18,813.93, 28,221.70 and 7,712.81 is: 11,569.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,813.93 : 28,221.70 = 7,712.81 : x
  2. Step 2: Convert to fraction form
    18,813.93/28,221.70 = 7,712.81/x
  3. Step 3: Cross multiply
    18,813.93x = 28,221.70 × 7,712.81
  4. Step 4: Simplify right side
    18,813.93x = 217,668,609.98
  5. Step 5: Solve for x
    x = 217,668,609.98/18,813.93
  6. Step 6: Final answer
    x = 11,569.55

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1.5x scale

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.