Home / 30,774.11-42,478.38-18,675.14

Finding the Fourth Proportional to 30,774.11, 42,478.38 and 18,675.14

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Solution

The fourth proportional to 30,774.11, 42,478.38 and 18,675.14 is: 25,777.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,774.11 : 42,478.38 = 18,675.14 : x
  2. Step 2: Convert to fraction form
    30,774.11/42,478.38 = 18,675.14/x
  3. Step 3: Cross multiply
    30,774.11x = 42,478.38 × 18,675.14
  4. Step 4: Simplify right side
    30,774.11x = 793,289,481.08
  5. Step 5: Solve for x
    x = 793,289,481.08/30,774.11
  6. Step 6: Final answer
    x = 25,777.82

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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.