Home / 21,578.83-32,357.81-12,811.39

Finding the Fourth Proportional to 21,578.83, 32,357.81 and 12,811.39

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Solution

The fourth proportional to 21,578.83, 32,357.81 and 12,811.39 is: 19,210.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,578.83 : 32,357.81 = 12,811.39 : x
  2. Step 2: Convert to fraction form
    21,578.83/32,357.81 = 12,811.39/x
  3. Step 3: Cross multiply
    21,578.83x = 32,357.81 × 12,811.39
  4. Step 4: Simplify right side
    21,578.83x = 414,548,459.40
  5. Step 5: Solve for x
    x = 414,548,459.40/21,578.83
  6. Step 6: Final answer
    x = 19,210.89

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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.