Home / 21,329.75-31,980.94-8,858.39

Finding the Fourth Proportional to 21,329.75, 31,980.94 and 8,858.39

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Solution

The fourth proportional to 21,329.75, 31,980.94 and 8,858.39 is: 13,281.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,329.75 : 31,980.94 = 8,858.39 : x
  2. Step 2: Convert to fraction form
    21,329.75/31,980.94 = 8,858.39/x
  3. Step 3: Cross multiply
    21,329.75x = 31,980.94 × 8,858.39
  4. Step 4: Simplify right side
    21,329.75x = 283,299,457.04
  5. Step 5: Solve for x
    x = 283,299,457.04/21,329.75
  6. Step 6: Final answer
    x = 13,281.89

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1.5x scale

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.