Home / 25,455.09-38,162.80-12,121.21

Finding the Fourth Proportional to 25,455.09, 38,162.80 and 12,121.21

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Solution

The fourth proportional to 25,455.09, 38,162.80 and 12,121.21 is: 18,172.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,455.09 : 38,162.80 = 12,121.21 : x
  2. Step 2: Convert to fraction form
    25,455.09/38,162.80 = 12,121.21/x
  3. Step 3: Cross multiply
    25,455.09x = 38,162.80 × 12,121.21
  4. Step 4: Simplify right side
    25,455.09x = 462,579,312.99
  5. Step 5: Solve for x
    x = 462,579,312.99/25,455.09
  6. Step 6: Final answer
    x = 18,172.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.