Home / 30,968.31-42,728.94-18,222.05

Finding the Fourth Proportional to 30,968.31, 42,728.94 and 18,222.05

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Solution

The fourth proportional to 30,968.31, 42,728.94 and 18,222.05 is: 25,142.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,968.31 : 42,728.94 = 18,222.05 : x
  2. Step 2: Convert to fraction form
    30,968.31/42,728.94 = 18,222.05/x
  3. Step 3: Cross multiply
    30,968.31x = 42,728.94 × 18,222.05
  4. Step 4: Simplify right side
    30,968.31x = 778,608,881.13
  5. Step 5: Solve for x
    x = 778,608,881.13/30,968.31
  6. Step 6: Final answer
    x = 25,142.12

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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.