Home / 21,666.89-29,900.31-12,236.06

Finding the Fourth Proportional to 21,666.89, 29,900.31 and 12,236.06

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Solution

The fourth proportional to 21,666.89, 29,900.31 and 12,236.06 is: 16,885.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,666.89 : 29,900.31 = 12,236.06 : x
  2. Step 2: Convert to fraction form
    21,666.89/29,900.31 = 12,236.06/x
  3. Step 3: Cross multiply
    21,666.89x = 29,900.31 × 12,236.06
  4. Step 4: Simplify right side
    21,666.89x = 365,861,987.18
  5. Step 5: Solve for x
    x = 365,861,987.18/21,666.89
  6. Step 6: Final answer
    x = 16,885.76

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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.