Home / 21,814.40-30,103.44-12,862.28

Finding the Fourth Proportional to 21,814.40, 30,103.44 and 12,862.28

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Solution

The fourth proportional to 21,814.40, 30,103.44 and 12,862.28 is: 17,749.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,814.40 : 30,103.44 = 12,862.28 : x
  2. Step 2: Convert to fraction form
    21,814.40/30,103.44 = 12,862.28/x
  3. Step 3: Cross multiply
    21,814.40x = 30,103.44 × 12,862.28
  4. Step 4: Simplify right side
    21,814.40x = 387,198,874.24
  5. Step 5: Solve for x
    x = 387,198,874.24/21,814.40
  6. Step 6: Final answer
    x = 17,749.69

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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.