Home / 20,811.50-28,743.53-13,993.66

Finding the Fourth Proportional to 20,811.50, 28,743.53 and 13,993.66

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Solution

The fourth proportional to 20,811.50, 28,743.53 and 13,993.66 is: 19,327.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.50 : 28,743.53 = 13,993.66 : x
  2. Step 2: Convert to fraction form
    20,811.50/28,743.53 = 13,993.66/x
  3. Step 3: Cross multiply
    20,811.50x = 28,743.53 × 13,993.66
  4. Step 4: Simplify right side
    20,811.50x = 402,227,186.02
  5. Step 5: Solve for x
    x = 402,227,186.02/20,811.50
  6. Step 6: Final answer
    x = 19,327.16

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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.