Home / 21,139.50-29,173.16-11,708.94

Finding the Fourth Proportional to 21,139.50, 29,173.16 and 11,708.94

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Solution

The fourth proportional to 21,139.50, 29,173.16 and 11,708.94 is: 16,158.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,139.50 : 29,173.16 = 11,708.94 : x
  2. Step 2: Convert to fraction form
    21,139.50/29,173.16 = 11,708.94/x
  3. Step 3: Cross multiply
    21,139.50x = 29,173.16 × 11,708.94
  4. Step 4: Simplify right side
    21,139.50x = 341,586,780.05
  5. Step 5: Solve for x
    x = 341,586,780.05/21,139.50
  6. Step 6: Final answer
    x = 16,158.70

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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.