Home / 30,734.85-42,403.59-18,639.03

Finding the Fourth Proportional to 30,734.85, 42,403.59 and 18,639.03

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Solution

The fourth proportional to 30,734.85, 42,403.59 and 18,639.03 is: 25,715.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,734.85 : 42,403.59 = 18,639.03 : x
  2. Step 2: Convert to fraction form
    30,734.85/42,403.59 = 18,639.03/x
  3. Step 3: Cross multiply
    30,734.85x = 42,403.59 × 18,639.03
  4. Step 4: Simplify right side
    30,734.85x = 790,361,786.12
  5. Step 5: Solve for x
    x = 790,361,786.12/30,734.85
  6. Step 6: Final answer
    x = 25,715.49

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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.