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Finding the Fourth Proportional to 18,669.76, 28,005.36 and 4,818.76

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Solution

The fourth proportional to 18,669.76, 28,005.36 and 4,818.76 is: 7,228.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,669.76 : 28,005.36 = 4,818.76 : x
  2. Step 2: Convert to fraction form
    18,669.76/28,005.36 = 4,818.76/x
  3. Step 3: Cross multiply
    18,669.76x = 28,005.36 × 4,818.76
  4. Step 4: Simplify right side
    18,669.76x = 134,951,108.55
  5. Step 5: Solve for x
    x = 134,951,108.55/18,669.76
  6. Step 6: Final answer
    x = 7,228.33

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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.