Home / 30,661.26-42,312.92-18,561.58

Finding the Fourth Proportional to 30,661.26, 42,312.92 and 18,561.58

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Solution

The fourth proportional to 30,661.26, 42,312.92 and 18,561.58 is: 25,615.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,661.26 : 42,312.92 = 18,561.58 : x
  2. Step 2: Convert to fraction form
    30,661.26/42,312.92 = 18,561.58/x
  3. Step 3: Cross multiply
    30,661.26x = 42,312.92 × 18,561.58
  4. Step 4: Simplify right side
    30,661.26x = 785,394,451.02
  5. Step 5: Solve for x
    x = 785,394,451.02/30,661.26
  6. Step 6: Final answer
    x = 25,615.21

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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.