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Finding the Fourth Proportional to 18,135.63, 27,214.18 and 9,815.45

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Solution

The fourth proportional to 18,135.63, 27,214.18 and 9,815.45 is: 14,728.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,135.63 : 27,214.18 = 9,815.45 : x
  2. Step 2: Convert to fraction form
    18,135.63/27,214.18 = 9,815.45/x
  3. Step 3: Cross multiply
    18,135.63x = 27,214.18 × 9,815.45
  4. Step 4: Simplify right side
    18,135.63x = 267,119,262.47
  5. Step 5: Solve for x
    x = 267,119,262.47/18,135.63
  6. Step 6: Final answer
    x = 14,728.98

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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.