Home / 20,945.79-31,419.41-10,551.87

Finding the Fourth Proportional to 20,945.79, 31,419.41 and 10,551.87

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Solution

The fourth proportional to 20,945.79, 31,419.41 and 10,551.87 is: 15,828.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.79 : 31,419.41 = 10,551.87 : x
  2. Step 2: Convert to fraction form
    20,945.79/31,419.41 = 10,551.87/x
  3. Step 3: Cross multiply
    20,945.79x = 31,419.41 × 10,551.87
  4. Step 4: Simplify right side
    20,945.79x = 331,533,477.04
  5. Step 5: Solve for x
    x = 331,533,477.04/20,945.79
  6. Step 6: Final answer
    x = 15,828.17

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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.