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Finding the Fourth Proportional to 18,776.34, 28,169.82 and 9,405.04

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Solution

The fourth proportional to 18,776.34, 28,169.82 and 9,405.04 is: 14,110.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,776.34 : 28,169.82 = 9,405.04 : x
  2. Step 2: Convert to fraction form
    18,776.34/28,169.82 = 9,405.04/x
  3. Step 3: Cross multiply
    18,776.34x = 28,169.82 × 9,405.04
  4. Step 4: Simplify right side
    18,776.34x = 264,938,283.89
  5. Step 5: Solve for x
    x = 264,938,283.89/18,776.34
  6. Step 6: Final answer
    x = 14,110.22

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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.