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Finding the Fourth Proportional to 18,395.20, 27,582.72 and 7,290.64

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Solution

The fourth proportional to 18,395.20, 27,582.72 and 7,290.64 is: 10,931.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,395.20 : 27,582.72 = 7,290.64 : x
  2. Step 2: Convert to fraction form
    18,395.20/27,582.72 = 7,290.64/x
  3. Step 3: Cross multiply
    18,395.20x = 27,582.72 × 7,290.64
  4. Step 4: Simplify right side
    18,395.20x = 201,095,681.74
  5. Step 5: Solve for x
    x = 201,095,681.74/18,395.20
  6. Step 6: Final answer
    x = 10,931.96

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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.