Home / 20,699.67-28,571.58-13,530.63

Finding the Fourth Proportional to 20,699.67, 28,571.58 and 13,530.63

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Solution

The fourth proportional to 20,699.67, 28,571.58 and 13,530.63 is: 18,676.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,699.67 : 28,571.58 = 13,530.63 : x
  2. Step 2: Convert to fraction form
    20,699.67/28,571.58 = 13,530.63/x
  3. Step 3: Cross multiply
    20,699.67x = 28,571.58 × 13,530.63
  4. Step 4: Simplify right side
    20,699.67x = 386,591,477.50
  5. Step 5: Solve for x
    x = 386,591,477.50/20,699.67
  6. Step 6: Final answer
    x = 18,676.21

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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.