Home / 21,813.44-30,102.22-12,861.32

Finding the Fourth Proportional to 21,813.44, 30,102.22 and 12,861.32

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Solution

The fourth proportional to 21,813.44, 30,102.22 and 12,861.32 is: 17,748.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,813.44 : 30,102.22 = 12,861.32 : x
  2. Step 2: Convert to fraction form
    21,813.44/30,102.22 = 12,861.32/x
  3. Step 3: Cross multiply
    21,813.44x = 30,102.22 × 12,861.32
  4. Step 4: Simplify right side
    21,813.44x = 387,154,284.13
  5. Step 5: Solve for x
    x = 387,154,284.13/21,813.44
  6. Step 6: Final answer
    x = 17,748.43

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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.