Home / 20,991.21-31,486.77-14,397.41

Finding the Fourth Proportional to 20,991.21, 31,486.77 and 14,397.41

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Solution

The fourth proportional to 20,991.21, 31,486.77 and 14,397.41 is: 21,596.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,991.21 : 31,486.77 = 14,397.41 : x
  2. Step 2: Convert to fraction form
    20,991.21/31,486.77 = 14,397.41/x
  3. Step 3: Cross multiply
    20,991.21x = 31,486.77 × 14,397.41
  4. Step 4: Simplify right side
    20,991.21x = 453,327,779.83
  5. Step 5: Solve for x
    x = 453,327,779.83/20,991.21
  6. Step 6: Final answer
    x = 21,596.08

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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.