Home / 20,741.68-31,112.38-12,424.06

Finding the Fourth Proportional to 20,741.68, 31,112.38 and 12,424.06

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Solution

The fourth proportional to 20,741.68, 31,112.38 and 12,424.06 is: 18,636.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,741.68 : 31,112.38 = 12,424.06 : x
  2. Step 2: Convert to fraction form
    20,741.68/31,112.38 = 12,424.06/x
  3. Step 3: Cross multiply
    20,741.68x = 31,112.38 × 12,424.06
  4. Step 4: Simplify right side
    20,741.68x = 386,542,075.86
  5. Step 5: Solve for x
    x = 386,542,075.86/20,741.68
  6. Step 6: Final answer
    x = 18,636.01

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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.