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Finding the Fourth Proportional to 18,753.63, 28,136.93 and 7,070.19

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Solution

The fourth proportional to 18,753.63, 28,136.93 and 7,070.19 is: 10,607.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,753.63 : 28,136.93 = 7,070.19 : x
  2. Step 2: Convert to fraction form
    18,753.63/28,136.93 = 7,070.19/x
  3. Step 3: Cross multiply
    18,753.63x = 28,136.93 × 7,070.19
  4. Step 4: Simplify right side
    18,753.63x = 198,933,405.77
  5. Step 5: Solve for x
    x = 198,933,405.77/18,753.63
  6. Step 6: Final answer
    x = 10,607.73

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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.