Home / 21,327.84-31,998.96-13,436.28

Finding the Fourth Proportional to 21,327.84, 31,998.96 and 13,436.28

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Solution

The fourth proportional to 21,327.84, 31,998.96 and 13,436.28 is: 20,158.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,327.84 : 31,998.96 = 13,436.28 : x
  2. Step 2: Convert to fraction form
    21,327.84/31,998.96 = 13,436.28/x
  3. Step 3: Cross multiply
    21,327.84x = 31,998.96 × 13,436.28
  4. Step 4: Simplify right side
    21,327.84x = 429,946,986.27
  5. Step 5: Solve for x
    x = 429,946,986.27/21,327.84
  6. Step 6: Final answer
    x = 20,158.96

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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.