Home / 20,371.36-28,108.20-13,308.16

Finding the Fourth Proportional to 20,371.36, 28,108.20 and 13,308.16

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Solution

The fourth proportional to 20,371.36, 28,108.20 and 13,308.16 is: 18,362.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,371.36 : 28,108.20 = 13,308.16 : x
  2. Step 2: Convert to fraction form
    20,371.36/28,108.20 = 13,308.16/x
  3. Step 3: Cross multiply
    20,371.36x = 28,108.20 × 13,308.16
  4. Step 4: Simplify right side
    20,371.36x = 374,068,422.91
  5. Step 5: Solve for x
    x = 374,068,422.91/20,371.36
  6. Step 6: Final answer
    x = 18,362.47

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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.