Home / 21,814.14-30,102.84-12,862.20

Finding the Fourth Proportional to 21,814.14, 30,102.84 and 12,862.20

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Solution

The fourth proportional to 21,814.14, 30,102.84 and 12,862.20 is: 17,749.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,814.14 : 30,102.84 = 12,862.20 : x
  2. Step 2: Convert to fraction form
    21,814.14/30,102.84 = 12,862.20/x
  3. Step 3: Cross multiply
    21,814.14x = 30,102.84 × 12,862.20
  4. Step 4: Simplify right side
    21,814.14x = 387,188,748.65
  5. Step 5: Solve for x
    x = 387,188,748.65/21,814.14
  6. Step 6: Final answer
    x = 17,749.44

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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.