Home / 20,643.21-28,487.51-11,211.69

Finding the Fourth Proportional to 20,643.21, 28,487.51 and 11,211.69

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Solution

The fourth proportional to 20,643.21, 28,487.51 and 11,211.69 is: 15,472.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.21 : 28,487.51 = 11,211.69 : x
  2. Step 2: Convert to fraction form
    20,643.21/28,487.51 = 11,211.69/x
  3. Step 3: Cross multiply
    20,643.21x = 28,487.51 × 11,211.69
  4. Step 4: Simplify right side
    20,643.21x = 319,393,074.93
  5. Step 5: Solve for x
    x = 319,393,074.93/20,643.21
  6. Step 6: Final answer
    x = 15,472.06

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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.