Home / 20,922.70-28,863.59-13,365.18

Finding the Fourth Proportional to 20,922.70, 28,863.59 and 13,365.18

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Solution

The fourth proportional to 20,922.70, 28,863.59 and 13,365.18 is: 18,437.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.70 : 28,863.59 = 13,365.18 : x
  2. Step 2: Convert to fraction form
    20,922.70/28,863.59 = 13,365.18/x
  3. Step 3: Cross multiply
    20,922.70x = 28,863.59 × 13,365.18
  4. Step 4: Simplify right side
    20,922.70x = 385,767,075.80
  5. Step 5: Solve for x
    x = 385,767,075.80/20,922.70
  6. Step 6: Final answer
    x = 18,437.73

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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.