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Finding the Fourth Proportional to 18,420.10, 27,630.15 and 15,568.90

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Solution

The fourth proportional to 18,420.10, 27,630.15 and 15,568.90 is: 23,353.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,420.10 : 27,630.15 = 15,568.90 : x
  2. Step 2: Convert to fraction form
    18,420.10/27,630.15 = 15,568.90/x
  3. Step 3: Cross multiply
    18,420.10x = 27,630.15 × 15,568.90
  4. Step 4: Simplify right side
    18,420.10x = 430,171,042.34
  5. Step 5: Solve for x
    x = 430,171,042.34/18,420.10
  6. Step 6: Final answer
    x = 23,353.35

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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.