Home / 30,811.04-42,530.12-18,235.76

Finding the Fourth Proportional to 30,811.04, 42,530.12 and 18,235.76

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Solution

The fourth proportional to 30,811.04, 42,530.12 and 18,235.76 is: 25,171.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,811.04 : 42,530.12 = 18,235.76 : x
  2. Step 2: Convert to fraction form
    30,811.04/42,530.12 = 18,235.76/x
  3. Step 3: Cross multiply
    30,811.04x = 42,530.12 × 18,235.76
  4. Step 4: Simplify right side
    30,811.04x = 775,569,061.09
  5. Step 5: Solve for x
    x = 775,569,061.09/30,811.04
  6. Step 6: Final answer
    x = 25,171.79

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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.