Home / 21,671.19-29,908.26-13,171.32

Finding the Fourth Proportional to 21,671.19, 29,908.26 and 13,171.32

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Solution

The fourth proportional to 21,671.19, 29,908.26 and 13,171.32 is: 18,177.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,671.19 : 29,908.26 = 13,171.32 : x
  2. Step 2: Convert to fraction form
    21,671.19/29,908.26 = 13,171.32/x
  3. Step 3: Cross multiply
    21,671.19x = 29,908.26 × 13,171.32
  4. Step 4: Simplify right side
    21,671.19x = 393,931,263.10
  5. Step 5: Solve for x
    x = 393,931,263.10/21,671.19
  6. Step 6: Final answer
    x = 18,177.65

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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.