Home / 12,135.20-16,742.53-9,893.21

Finding the Fourth Proportional to 12,135.20, 16,742.53 and 9,893.21

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Solution

The fourth proportional to 12,135.20, 16,742.53 and 9,893.21 is: 13,649.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,135.20 : 16,742.53 = 9,893.21 : x
  2. Step 2: Convert to fraction form
    12,135.20/16,742.53 = 9,893.21/x
  3. Step 3: Cross multiply
    12,135.20x = 16,742.53 × 9,893.21
  4. Step 4: Simplify right side
    12,135.20x = 165,637,365.22
  5. Step 5: Solve for x
    x = 165,637,365.22/12,135.20
  6. Step 6: Final answer
    x = 13,649.33

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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.