Home / 30,765.60-42,459.69-18,836.85

Finding the Fourth Proportional to 30,765.60, 42,459.69 and 18,836.85

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Solution

The fourth proportional to 30,765.60, 42,459.69 and 18,836.85 is: 25,996.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,765.60 : 42,459.69 = 18,836.85 : x
  2. Step 2: Convert to fraction form
    30,765.60/42,459.69 = 18,836.85/x
  3. Step 3: Cross multiply
    30,765.60x = 42,459.69 × 18,836.85
  4. Step 4: Simplify right side
    30,765.60x = 799,806,811.58
  5. Step 5: Solve for x
    x = 799,806,811.58/30,765.60
  6. Step 6: Final answer
    x = 25,996.79

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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.