Home / 20,615.36-28,447.47-11,660.81

Finding the Fourth Proportional to 20,615.36, 28,447.47 and 11,660.81

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Solution

The fourth proportional to 20,615.36, 28,447.47 and 11,660.81 is: 16,090.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.36 : 28,447.47 = 11,660.81 : x
  2. Step 2: Convert to fraction form
    20,615.36/28,447.47 = 11,660.81/x
  3. Step 3: Cross multiply
    20,615.36x = 28,447.47 × 11,660.81
  4. Step 4: Simplify right side
    20,615.36x = 331,720,400.41
  5. Step 5: Solve for x
    x = 331,720,400.41/20,615.36
  6. Step 6: Final answer
    x = 16,090.94

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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.