Home / 21,403.12-29,536.08-11,971.76

Finding the Fourth Proportional to 21,403.12, 29,536.08 and 11,971.76

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Solution

The fourth proportional to 21,403.12, 29,536.08 and 11,971.76 is: 16,520.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,403.12 : 29,536.08 = 11,971.76 : x
  2. Step 2: Convert to fraction form
    21,403.12/29,536.08 = 11,971.76/x
  3. Step 3: Cross multiply
    21,403.12x = 29,536.08 × 11,971.76
  4. Step 4: Simplify right side
    21,403.12x = 353,598,861.10
  5. Step 5: Solve for x
    x = 353,598,861.10/21,403.12
  6. Step 6: Final answer
    x = 16,520.90

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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.