Home / 21,153.28-31,725.44-13,351.68

Finding the Fourth Proportional to 21,153.28, 31,725.44 and 13,351.68

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Solution

The fourth proportional to 21,153.28, 31,725.44 and 13,351.68 is: 20,024.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,153.28 : 31,725.44 = 13,351.68 : x
  2. Step 2: Convert to fraction form
    21,153.28/31,725.44 = 13,351.68/x
  3. Step 3: Cross multiply
    21,153.28x = 31,725.44 × 13,351.68
  4. Step 4: Simplify right side
    21,153.28x = 423,587,922.74
  5. Step 5: Solve for x
    x = 423,587,922.74/21,153.28
  6. Step 6: Final answer
    x = 20,024.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.