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Finding the Fourth Proportional to 18,790.87, 28,172.95 and 9,424.13

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Solution

The fourth proportional to 18,790.87, 28,172.95 and 9,424.13 is: 14,129.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,790.87 : 28,172.95 = 9,424.13 : x
  2. Step 2: Convert to fraction form
    18,790.87/28,172.95 = 9,424.13/x
  3. Step 3: Cross multiply
    18,790.87x = 28,172.95 × 9,424.13
  4. Step 4: Simplify right side
    18,790.87x = 265,505,543.28
  5. Step 5: Solve for x
    x = 265,505,543.28/18,790.87
  6. Step 6: Final answer
    x = 14,129.50

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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.