Home / 21,102.32-29,134.49-13,551.71

Finding the Fourth Proportional to 21,102.32, 29,134.49 and 13,551.71

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Solution

The fourth proportional to 21,102.32, 29,134.49 and 13,551.71 is: 18,709.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,102.32 : 29,134.49 = 13,551.71 : x
  2. Step 2: Convert to fraction form
    21,102.32/29,134.49 = 13,551.71/x
  3. Step 3: Cross multiply
    21,102.32x = 29,134.49 × 13,551.71
  4. Step 4: Simplify right side
    21,102.32x = 394,821,946.05
  5. Step 5: Solve for x
    x = 394,821,946.05/21,102.32
  6. Step 6: Final answer
    x = 18,709.88

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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.