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Finding the Fourth Proportional to 18,700.20, 28,051.74 and 5,552.54

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Solution

The fourth proportional to 18,700.20, 28,051.74 and 5,552.54 is: 8,329.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,700.20 : 28,051.74 = 5,552.54 : x
  2. Step 2: Convert to fraction form
    18,700.20/28,051.74 = 5,552.54/x
  3. Step 3: Cross multiply
    18,700.20x = 28,051.74 × 5,552.54
  4. Step 4: Simplify right side
    18,700.20x = 155,758,268.16
  5. Step 5: Solve for x
    x = 155,758,268.16/18,700.20
  6. Step 6: Final answer
    x = 8,329.23

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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.