Home / 20,623.48-28,416.45-13,897.43

Finding the Fourth Proportional to 20,623.48, 28,416.45 and 13,897.43

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Solution

The fourth proportional to 20,623.48, 28,416.45 and 13,897.43 is: 19,148.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,623.48 : 28,416.45 = 13,897.43 : x
  2. Step 2: Convert to fraction form
    20,623.48/28,416.45 = 13,897.43/x
  3. Step 3: Cross multiply
    20,623.48x = 28,416.45 × 13,897.43
  4. Step 4: Simplify right side
    20,623.48x = 394,915,484.20
  5. Step 5: Solve for x
    x = 394,915,484.20/20,623.48
  6. Step 6: Final answer
    x = 19,148.83

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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.