Home / 21,780.60-32,703.30-16,855.80

Finding the Fourth Proportional to 21,780.60, 32,703.30 and 16,855.80

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Solution

The fourth proportional to 21,780.60, 32,703.30 and 16,855.80 is: 25,308.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780.60 : 32,703.30 = 16,855.80 : x
  2. Step 2: Convert to fraction form
    21,780.60/32,703.30 = 16,855.80/x
  3. Step 3: Cross multiply
    21,780.60x = 32,703.30 × 16,855.80
  4. Step 4: Simplify right side
    21,780.60x = 551,240,284.14
  5. Step 5: Solve for x
    x = 551,240,284.14/21,780.60
  6. Step 6: Final answer
    x = 25,308.77

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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.