Home / 15,405.21-21,262.68-12,882.94

Finding the Fourth Proportional to 15,405.21, 21,262.68 and 12,882.94

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Solution

The fourth proportional to 15,405.21, 21,262.68 and 12,882.94 is: 17,781.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,405.21 : 21,262.68 = 12,882.94 : x
  2. Step 2: Convert to fraction form
    15,405.21/21,262.68 = 12,882.94/x
  3. Step 3: Cross multiply
    15,405.21x = 21,262.68 × 12,882.94
  4. Step 4: Simplify right side
    15,405.21x = 273,925,830.68
  5. Step 5: Solve for x
    x = 273,925,830.68/15,405.21
  6. Step 6: Final answer
    x = 17,781.38

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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.