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Finding the Fourth Proportional to 18,702.96, 28,041.48 and 8,309.04

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Solution

The fourth proportional to 18,702.96, 28,041.48 and 8,309.04 is: 12,457.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,702.96 : 28,041.48 = 8,309.04 : x
  2. Step 2: Convert to fraction form
    18,702.96/28,041.48 = 8,309.04/x
  3. Step 3: Cross multiply
    18,702.96x = 28,041.48 × 8,309.04
  4. Step 4: Simplify right side
    18,702.96x = 232,997,778.98
  5. Step 5: Solve for x
    x = 232,997,778.98/18,702.96
  6. Step 6: Final answer
    x = 12,457.80

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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.