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Finding the Fourth Proportional to 18,762.35, 28,143.59 and 7,522.79

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Solution

The fourth proportional to 18,762.35, 28,143.59 and 7,522.79 is: 11,284.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,762.35 : 28,143.59 = 7,522.79 : x
  2. Step 2: Convert to fraction form
    18,762.35/28,143.59 = 7,522.79/x
  3. Step 3: Cross multiply
    18,762.35x = 28,143.59 × 7,522.79
  4. Step 4: Simplify right side
    18,762.35x = 211,718,139.08
  5. Step 5: Solve for x
    x = 211,718,139.08/18,762.35
  6. Step 6: Final answer
    x = 11,284.20

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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.