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Finding the Fourth Proportional to 18,435.38, 25,440 and 10,478.34

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Solution

The fourth proportional to 18,435.38, 25,440 and 10,478.34 is: 14,459.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,435.38 : 25,440 = 10,478.34 : x
  2. Step 2: Convert to fraction form
    18,435.38/25,440 = 10,478.34/x
  3. Step 3: Cross multiply
    18,435.38x = 25,440 × 10,478.34
  4. Step 4: Simplify right side
    18,435.38x = 266,568,969.60
  5. Step 5: Solve for x
    x = 266,568,969.60/18,435.38
  6. Step 6: Final answer
    x = 14,459.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.