Home / 20,101.36-27,749.40-13,398.16

Finding the Fourth Proportional to 20,101.36, 27,749.40 and 13,398.16

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Solution

The fourth proportional to 20,101.36, 27,749.40 and 13,398.16 is: 18,495.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,101.36 : 27,749.40 = 13,398.16 : x
  2. Step 2: Convert to fraction form
    20,101.36/27,749.40 = 13,398.16/x
  3. Step 3: Cross multiply
    20,101.36x = 27,749.40 × 13,398.16
  4. Step 4: Simplify right side
    20,101.36x = 371,790,901.10
  5. Step 5: Solve for x
    x = 371,790,901.10/20,101.36
  6. Step 6: Final answer
    x = 18,495.81

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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.