Home / 13,427.85-20,129.42-7,192.13

Finding the Fourth Proportional to 13,427.85, 20,129.42 and 7,192.13

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Solution

The fourth proportional to 13,427.85, 20,129.42 and 7,192.13 is: 10,781.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,427.85 : 20,129.42 = 7,192.13 : x
  2. Step 2: Convert to fraction form
    13,427.85/20,129.42 = 7,192.13/x
  3. Step 3: Cross multiply
    13,427.85x = 20,129.42 × 7,192.13
  4. Step 4: Simplify right side
    13,427.85x = 144,773,473.77
  5. Step 5: Solve for x
    x = 144,773,473.77/13,427.85
  6. Step 6: Final answer
    x = 10,781.58

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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.