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Finding the Fourth Proportional to 18,824.64, 28,215.48 and 8,818.92

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Solution

The fourth proportional to 18,824.64, 28,215.48 and 8,818.92 is: 13,218.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,824.64 : 28,215.48 = 8,818.92 : x
  2. Step 2: Convert to fraction form
    18,824.64/28,215.48 = 8,818.92/x
  3. Step 3: Cross multiply
    18,824.64x = 28,215.48 × 8,818.92
  4. Step 4: Simplify right side
    18,824.64x = 248,830,060.88
  5. Step 5: Solve for x
    x = 248,830,060.88/18,824.64
  6. Step 6: Final answer
    x = 13,218.32

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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.