Home / 20,353.03-28,103.40-13,553.68

Finding the Fourth Proportional to 20,353.03, 28,103.40 and 13,553.68

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Solution

The fourth proportional to 20,353.03, 28,103.40 and 13,553.68 is: 18,714.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,353.03 : 28,103.40 = 13,553.68 : x
  2. Step 2: Convert to fraction form
    20,353.03/28,103.40 = 13,553.68/x
  3. Step 3: Cross multiply
    20,353.03x = 28,103.40 × 13,553.68
  4. Step 4: Simplify right side
    20,353.03x = 380,904,490.51
  5. Step 5: Solve for x
    x = 380,904,490.51/20,353.03
  6. Step 6: Final answer
    x = 18,714.88

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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.