Home / 18,666.40-28,003.75-6,820.15

Finding the Fourth Proportional to 18,666.40, 28,003.75 and 6,820.15

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Solution

The fourth proportional to 18,666.40, 28,003.75 and 6,820.15 is: 10,231.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,666.40 : 28,003.75 = 6,820.15 : x
  2. Step 2: Convert to fraction form
    18,666.40/28,003.75 = 6,820.15/x
  3. Step 3: Cross multiply
    18,666.40x = 28,003.75 × 6,820.15
  4. Step 4: Simplify right side
    18,666.40x = 190,989,775.56
  5. Step 5: Solve for x
    x = 190,989,775.56/18,666.40
  6. Step 6: Final answer
    x = 10,231.74

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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.