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Finding the Fourth Proportional to 18,767.52, 28,159.52 and 7,078.01

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Solution

The fourth proportional to 18,767.52, 28,159.52 and 7,078.01 is: 10,620.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,767.52 : 28,159.52 = 7,078.01 : x
  2. Step 2: Convert to fraction form
    18,767.52/28,159.52 = 7,078.01/x
  3. Step 3: Cross multiply
    18,767.52x = 28,159.52 × 7,078.01
  4. Step 4: Simplify right side
    18,767.52x = 199,313,326.89
  5. Step 5: Solve for x
    x = 199,313,326.89/18,767.52
  6. Step 6: Final answer
    x = 10,620.12

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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.