Home / 18,705.15-28,061.78-6,858.43

Finding the Fourth Proportional to 18,705.15, 28,061.78 and 6,858.43

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Solution

The fourth proportional to 18,705.15, 28,061.78 and 6,858.43 is: 10,289.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,705.15 : 28,061.78 = 6,858.43 : x
  2. Step 2: Convert to fraction form
    18,705.15/28,061.78 = 6,858.43/x
  3. Step 3: Cross multiply
    18,705.15x = 28,061.78 × 6,858.43
  4. Step 4: Simplify right side
    18,705.15x = 192,459,649.36
  5. Step 5: Solve for x
    x = 192,459,649.36/18,705.15
  6. Step 6: Final answer
    x = 10,289.13

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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.