Home / 30,840.24-42,560.10-18,102.54

Finding the Fourth Proportional to 30,840.24, 42,560.10 and 18,102.54

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Solution

The fourth proportional to 30,840.24, 42,560.10 and 18,102.54 is: 24,981.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,840.24 : 42,560.10 = 18,102.54 : x
  2. Step 2: Convert to fraction form
    30,840.24/42,560.10 = 18,102.54/x
  3. Step 3: Cross multiply
    30,840.24x = 42,560.10 × 18,102.54
  4. Step 4: Simplify right side
    30,840.24x = 770,445,912.65
  5. Step 5: Solve for x
    x = 770,445,912.65/30,840.24
  6. Step 6: Final answer
    x = 24,981.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.