Home / 21,618.60-29,835.48-12,189.12

Finding the Fourth Proportional to 21,618.60, 29,835.48 and 12,189.12

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Solution

The fourth proportional to 21,618.60, 29,835.48 and 12,189.12 is: 16,822.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,618.60 : 29,835.48 = 12,189.12 : x
  2. Step 2: Convert to fraction form
    21,618.60/29,835.48 = 12,189.12/x
  3. Step 3: Cross multiply
    21,618.60x = 29,835.48 × 12,189.12
  4. Step 4: Simplify right side
    21,618.60x = 363,668,245.98
  5. Step 5: Solve for x
    x = 363,668,245.98/21,618.60
  6. Step 6: Final answer
    x = 16,822.01

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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.