Home / 30,870.32-42,611.92-18,770.96

Finding the Fourth Proportional to 30,870.32, 42,611.92 and 18,770.96

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Solution

The fourth proportional to 30,870.32, 42,611.92 and 18,770.96 is: 25,910.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,870.32 : 42,611.92 = 18,770.96 : x
  2. Step 2: Convert to fraction form
    30,870.32/42,611.92 = 18,770.96/x
  3. Step 3: Cross multiply
    30,870.32x = 42,611.92 × 18,770.96
  4. Step 4: Simplify right side
    30,870.32x = 799,866,645.84
  5. Step 5: Solve for x
    x = 799,866,645.84/30,870.32
  6. Step 6: Final answer
    x = 25,910.54

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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.