Home / 20,859.90-28,795.98-13,316.22

Finding the Fourth Proportional to 20,859.90, 28,795.98 and 13,316.22

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Solution

The fourth proportional to 20,859.90, 28,795.98 and 13,316.22 is: 18,382.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,859.90 : 28,795.98 = 13,316.22 : x
  2. Step 2: Convert to fraction form
    20,859.90/28,795.98 = 13,316.22/x
  3. Step 3: Cross multiply
    20,859.90x = 28,795.98 × 13,316.22
  4. Step 4: Simplify right side
    20,859.90x = 383,453,604.80
  5. Step 5: Solve for x
    x = 383,453,604.80/20,859.90
  6. Step 6: Final answer
    x = 18,382.33

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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.