Home / 28,021.16-42,003.38-18,166.70

Finding the Fourth Proportional to 28,021.16, 42,003.38 and 18,166.70

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Solution

The fourth proportional to 28,021.16, 42,003.38 and 18,166.70 is: 27,231.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,021.16 : 42,003.38 = 18,166.70 : x
  2. Step 2: Convert to fraction form
    28,021.16/42,003.38 = 18,166.70/x
  3. Step 3: Cross multiply
    28,021.16x = 42,003.38 × 18,166.70
  4. Step 4: Simplify right side
    28,021.16x = 763,062,803.45
  5. Step 5: Solve for x
    x = 763,062,803.45/28,021.16
  6. Step 6: Final answer
    x = 27,231.66

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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.