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Finding the Fourth Proportional to 18,342.60, 27,513.90 and 10,955.40

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Solution

The fourth proportional to 18,342.60, 27,513.90 and 10,955.40 is: 16,433.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,342.60 : 27,513.90 = 10,955.40 : x
  2. Step 2: Convert to fraction form
    18,342.60/27,513.90 = 10,955.40/x
  3. Step 3: Cross multiply
    18,342.60x = 27,513.90 × 10,955.40
  4. Step 4: Simplify right side
    18,342.60x = 301,425,780.06
  5. Step 5: Solve for x
    x = 301,425,780.06/18,342.60
  6. Step 6: Final answer
    x = 16,433.10

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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.