Home / 20,424.81-28,185.51-12,480.33

Finding the Fourth Proportional to 20,424.81, 28,185.51 and 12,480.33

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Solution

The fourth proportional to 20,424.81, 28,185.51 and 12,480.33 is: 17,222.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,424.81 : 28,185.51 = 12,480.33 : x
  2. Step 2: Convert to fraction form
    20,424.81/28,185.51 = 12,480.33/x
  3. Step 3: Cross multiply
    20,424.81x = 28,185.51 × 12,480.33
  4. Step 4: Simplify right side
    20,424.81x = 351,764,466.02
  5. Step 5: Solve for x
    x = 351,764,466.02/20,424.81
  6. Step 6: Final answer
    x = 17,222.41

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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.