Home / 30,918.42-42,651.09-21,969.54

Finding the Fourth Proportional to 30,918.42, 42,651.09 and 21,969.54

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Solution

The fourth proportional to 30,918.42, 42,651.09 and 21,969.54 is: 30,306.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,918.42 : 42,651.09 = 21,969.54 : x
  2. Step 2: Convert to fraction form
    30,918.42/42,651.09 = 21,969.54/x
  3. Step 3: Cross multiply
    30,918.42x = 42,651.09 × 21,969.54
  4. Step 4: Simplify right side
    30,918.42x = 937,024,827.80
  5. Step 5: Solve for x
    x = 937,024,827.80/30,918.42
  6. Step 6: Final answer
    x = 30,306.36

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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.