Home / 20,471.09-28,258.02-13,775.81

Finding the Fourth Proportional to 20,471.09, 28,258.02 and 13,775.81

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Solution

The fourth proportional to 20,471.09, 28,258.02 and 13,775.81 is: 19,015.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,471.09 : 28,258.02 = 13,775.81 : x
  2. Step 2: Convert to fraction form
    20,471.09/28,258.02 = 13,775.81/x
  3. Step 3: Cross multiply
    20,471.09x = 28,258.02 × 13,775.81
  4. Step 4: Simplify right side
    20,471.09x = 389,276,973.21
  5. Step 5: Solve for x
    x = 389,276,973.21/20,471.09
  6. Step 6: Final answer
    x = 19,015.94

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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.