Home / 20,969.44-31,412.63-13,579.09

Finding the Fourth Proportional to 20,969.44, 31,412.63 and 13,579.09

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Solution

The fourth proportional to 20,969.44, 31,412.63 and 13,579.09 is: 20,341.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.44 : 31,412.63 = 13,579.09 : x
  2. Step 2: Convert to fraction form
    20,969.44/31,412.63 = 13,579.09/x
  3. Step 3: Cross multiply
    20,969.44x = 31,412.63 × 13,579.09
  4. Step 4: Simplify right side
    20,969.44x = 426,554,885.32
  5. Step 5: Solve for x
    x = 426,554,885.32/20,969.44
  6. Step 6: Final answer
    x = 20,341.74

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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.