Home / 28,185.10-42,247.14-18,331.45

Finding the Fourth Proportional to 28,185.10, 42,247.14 and 18,331.45

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Solution

The fourth proportional to 28,185.10, 42,247.14 and 18,331.45 is: 27,477.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,185.10 : 42,247.14 = 18,331.45 : x
  2. Step 2: Convert to fraction form
    28,185.10/42,247.14 = 18,331.45/x
  3. Step 3: Cross multiply
    28,185.10x = 42,247.14 × 18,331.45
  4. Step 4: Simplify right side
    28,185.10x = 774,451,334.55
  5. Step 5: Solve for x
    x = 774,451,334.55/28,185.10
  6. Step 6: Final answer
    x = 27,477.33

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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.