Home / 30,378.12-41,924.70-18,438.72

Finding the Fourth Proportional to 30,378.12, 41,924.70 and 18,438.72

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Solution

The fourth proportional to 30,378.12, 41,924.70 and 18,438.72 is: 25,447.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,378.12 : 41,924.70 = 18,438.72 : x
  2. Step 2: Convert to fraction form
    30,378.12/41,924.70 = 18,438.72/x
  3. Step 3: Cross multiply
    30,378.12x = 41,924.70 × 18,438.72
  4. Step 4: Simplify right side
    30,378.12x = 773,037,804.38
  5. Step 5: Solve for x
    x = 773,037,804.38/30,378.12
  6. Step 6: Final answer
    x = 25,447.19

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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.