Home / 21,423.80-32,106.40-13,618.64

Finding the Fourth Proportional to 21,423.80, 32,106.40 and 13,618.64

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Solution

The fourth proportional to 21,423.80, 32,106.40 and 13,618.64 is: 20,409.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,423.80 : 32,106.40 = 13,618.64 : x
  2. Step 2: Convert to fraction form
    21,423.80/32,106.40 = 13,618.64/x
  3. Step 3: Cross multiply
    21,423.80x = 32,106.40 × 13,618.64
  4. Step 4: Simplify right side
    21,423.80x = 437,245,503.30
  5. Step 5: Solve for x
    x = 437,245,503.30/21,423.80
  6. Step 6: Final answer
    x = 20,409.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.