Home / 21,123.15-29,151.30-12,170.49

Finding the Fourth Proportional to 21,123.15, 29,151.30 and 12,170.49

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Solution

The fourth proportional to 21,123.15, 29,151.30 and 12,170.49 is: 16,796.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,123.15 : 29,151.30 = 12,170.49 : x
  2. Step 2: Convert to fraction form
    21,123.15/29,151.30 = 12,170.49/x
  3. Step 3: Cross multiply
    21,123.15x = 29,151.30 × 12,170.49
  4. Step 4: Simplify right side
    21,123.15x = 354,785,605.14
  5. Step 5: Solve for x
    x = 354,785,605.14/21,123.15
  6. Step 6: Final answer
    x = 16,796.06

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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.