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Finding the Fourth Proportional to 18,810.88, 28,210.64 and 5,659.76

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Solution

The fourth proportional to 18,810.88, 28,210.64 and 5,659.76 is: 8,487.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,810.88 : 28,210.64 = 5,659.76 : x
  2. Step 2: Convert to fraction form
    18,810.88/28,210.64 = 5,659.76/x
  3. Step 3: Cross multiply
    18,810.88x = 28,210.64 × 5,659.76
  4. Step 4: Simplify right side
    18,810.88x = 159,665,451.85
  5. Step 5: Solve for x
    x = 159,665,451.85/18,810.88
  6. Step 6: Final answer
    x = 8,487.93

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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.