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Finding the Fourth Proportional to 18,999.56, 28,505.10 and 9,136.04

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Solution

The fourth proportional to 18,999.56, 28,505.10 and 9,136.04 is: 13,706.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999.56 : 28,505.10 = 9,136.04 : x
  2. Step 2: Convert to fraction form
    18,999.56/28,505.10 = 9,136.04/x
  3. Step 3: Cross multiply
    18,999.56x = 28,505.10 × 9,136.04
  4. Step 4: Simplify right side
    18,999.56x = 260,423,733.80
  5. Step 5: Solve for x
    x = 260,423,733.80/18,999.56
  6. Step 6: Final answer
    x = 13,706.83

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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.