Home / 20,127.40-30,203.38-12,721.66

Finding the Fourth Proportional to 20,127.40, 30,203.38 and 12,721.66

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Solution

The fourth proportional to 20,127.40, 30,203.38 and 12,721.66 is: 19,090.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,127.40 : 30,203.38 = 12,721.66 : x
  2. Step 2: Convert to fraction form
    20,127.40/30,203.38 = 12,721.66/x
  3. Step 3: Cross multiply
    20,127.40x = 30,203.38 × 12,721.66
  4. Step 4: Simplify right side
    20,127.40x = 384,237,131.21
  5. Step 5: Solve for x
    x = 384,237,131.21/20,127.40
  6. Step 6: Final answer
    x = 19,090.25

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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.