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Finding the Fourth Proportional to 18,776.81, 28,174.93 and 8,254.22

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Solution

The fourth proportional to 18,776.81, 28,174.93 and 8,254.22 is: 12,385.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,776.81 : 28,174.93 = 8,254.22 : x
  2. Step 2: Convert to fraction form
    18,776.81/28,174.93 = 8,254.22/x
  3. Step 3: Cross multiply
    18,776.81x = 28,174.93 × 8,254.22
  4. Step 4: Simplify right side
    18,776.81x = 232,562,070.70
  5. Step 5: Solve for x
    x = 232,562,070.70/18,776.81
  6. Step 6: Final answer
    x = 12,385.60

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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.