Home / 21,671.40-29,876.88-13,709.64

Finding the Fourth Proportional to 21,671.40, 29,876.88 and 13,709.64

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Solution

The fourth proportional to 21,671.40, 29,876.88 and 13,709.64 is: 18,900.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,671.40 : 29,876.88 = 13,709.64 : x
  2. Step 2: Convert to fraction form
    21,671.40/29,876.88 = 13,709.64/x
  3. Step 3: Cross multiply
    21,671.40x = 29,876.88 × 13,709.64
  4. Step 4: Simplify right side
    21,671.40x = 409,601,269.12
  5. Step 5: Solve for x
    x = 409,601,269.12/21,671.40
  6. Step 6: Final answer
    x = 18,900.54

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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.