Home / 20,590.98-28,416.14-11,638.86

Finding the Fourth Proportional to 20,590.98, 28,416.14 and 11,638.86

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Solution

The fourth proportional to 20,590.98, 28,416.14 and 11,638.86 is: 16,061.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,590.98 : 28,416.14 = 11,638.86 : x
  2. Step 2: Convert to fraction form
    20,590.98/28,416.14 = 11,638.86/x
  3. Step 3: Cross multiply
    20,590.98x = 28,416.14 × 11,638.86
  4. Step 4: Simplify right side
    20,590.98x = 330,731,475.20
  5. Step 5: Solve for x
    x = 330,731,475.20/20,590.98
  6. Step 6: Final answer
    x = 16,061.96

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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.