Home / 20,906.40-31,323.06-17,418.81

Finding the Fourth Proportional to 20,906.40, 31,323.06 and 17,418.81

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Solution

The fourth proportional to 20,906.40, 31,323.06 and 17,418.81 is: 26,097.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,906.40 : 31,323.06 = 17,418.81 : x
  2. Step 2: Convert to fraction form
    20,906.40/31,323.06 = 17,418.81/x
  3. Step 3: Cross multiply
    20,906.40x = 31,323.06 × 17,418.81
  4. Step 4: Simplify right side
    20,906.40x = 545,610,430.76
  5. Step 5: Solve for x
    x = 545,610,430.76/20,906.40
  6. Step 6: Final answer
    x = 26,097.77

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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.