Home / 18,818.47-28,221.79-6,809.07

Finding the Fourth Proportional to 18,818.47, 28,221.79 and 6,809.07

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Solution

The fourth proportional to 18,818.47, 28,221.79 and 6,809.07 is: 10,211.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,818.47 : 28,221.79 = 6,809.07 : x
  2. Step 2: Convert to fraction form
    18,818.47/28,221.79 = 6,809.07/x
  3. Step 3: Cross multiply
    18,818.47x = 28,221.79 × 6,809.07
  4. Step 4: Simplify right side
    18,818.47x = 192,164,143.64
  5. Step 5: Solve for x
    x = 192,164,143.64/18,818.47
  6. Step 6: Final answer
    x = 10,211.46

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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.