Home / 21,123.06-29,157.11-12,174.13

Finding the Fourth Proportional to 21,123.06, 29,157.11 and 12,174.13

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Solution

The fourth proportional to 21,123.06, 29,157.11 and 12,174.13 is: 16,804.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,123.06 : 29,157.11 = 12,174.13 : x
  2. Step 2: Convert to fraction form
    21,123.06/29,157.11 = 12,174.13/x
  3. Step 3: Cross multiply
    21,123.06x = 29,157.11 × 12,174.13
  4. Step 4: Simplify right side
    21,123.06x = 354,962,447.56
  5. Step 5: Solve for x
    x = 354,962,447.56/21,123.06
  6. Step 6: Final answer
    x = 16,804.50

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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.