Home / 15,503.24-21,450.80-13,517.96

Finding the Fourth Proportional to 15,503.24, 21,450.80 and 13,517.96

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Solution

The fourth proportional to 15,503.24, 21,450.80 and 13,517.96 is: 18,703.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,503.24 : 21,450.80 = 13,517.96 : x
  2. Step 2: Convert to fraction form
    15,503.24/21,450.80 = 13,517.96/x
  3. Step 3: Cross multiply
    15,503.24x = 21,450.80 × 13,517.96
  4. Step 4: Simplify right side
    15,503.24x = 289,971,056.37
  5. Step 5: Solve for x
    x = 289,971,056.37/15,503.24
  6. Step 6: Final answer
    x = 18,703.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.