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Finding the Fourth Proportional to 18,086.40, 24,960.40 and 10,128.32

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Solution

The fourth proportional to 18,086.40, 24,960.40 and 10,128.32 is: 13,977.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,086.40 : 24,960.40 = 10,128.32 : x
  2. Step 2: Convert to fraction form
    18,086.40/24,960.40 = 10,128.32/x
  3. Step 3: Cross multiply
    18,086.40x = 24,960.40 × 10,128.32
  4. Step 4: Simplify right side
    18,086.40x = 252,806,918.53
  5. Step 5: Solve for x
    x = 252,806,918.53/18,086.40
  6. Step 6: Final answer
    x = 13,977.74

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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.