Home / 30,811.12-42,519.65-18,071.84

Finding the Fourth Proportional to 30,811.12, 42,519.65 and 18,071.84

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Solution

The fourth proportional to 30,811.12, 42,519.65 and 18,071.84 is: 24,939.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,811.12 : 42,519.65 = 18,071.84 : x
  2. Step 2: Convert to fraction form
    30,811.12/42,519.65 = 18,071.84/x
  3. Step 3: Cross multiply
    30,811.12x = 42,519.65 × 18,071.84
  4. Step 4: Simplify right side
    30,811.12x = 768,408,327.60
  5. Step 5: Solve for x
    x = 768,408,327.60/30,811.12
  6. Step 6: Final answer
    x = 24,939.32

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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.