Home / 20,969.72-31,418.40-14,717.84

Finding the Fourth Proportional to 20,969.72, 31,418.40 and 14,717.84

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Solution

The fourth proportional to 20,969.72, 31,418.40 and 14,717.84 is: 22,051.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.72 : 31,418.40 = 14,717.84 : x
  2. Step 2: Convert to fraction form
    20,969.72/31,418.40 = 14,717.84/x
  3. Step 3: Cross multiply
    20,969.72x = 31,418.40 × 14,717.84
  4. Step 4: Simplify right side
    20,969.72x = 462,410,984.26
  5. Step 5: Solve for x
    x = 462,410,984.26/20,969.72
  6. Step 6: Final answer
    x = 22,051.37

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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.