Home / 20,362.31-28,090.49-12,812.81

Finding the Fourth Proportional to 20,362.31, 28,090.49 and 12,812.81

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Solution

The fourth proportional to 20,362.31, 28,090.49 and 12,812.81 is: 17,675.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,362.31 : 28,090.49 = 12,812.81 : x
  2. Step 2: Convert to fraction form
    20,362.31/28,090.49 = 12,812.81/x
  3. Step 3: Cross multiply
    20,362.31x = 28,090.49 × 12,812.81
  4. Step 4: Simplify right side
    20,362.31x = 359,917,906.66
  5. Step 5: Solve for x
    x = 359,917,906.66/20,362.31
  6. Step 6: Final answer
    x = 17,675.69

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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.