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Finding the Fourth Proportional to 18,470.81, 25,489.72 and 10,087.31

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Solution

The fourth proportional to 18,470.81, 25,489.72 and 10,087.31 is: 13,920.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,470.81 : 25,489.72 = 10,087.31 : x
  2. Step 2: Convert to fraction form
    18,470.81/25,489.72 = 10,087.31/x
  3. Step 3: Cross multiply
    18,470.81x = 25,489.72 × 10,087.31
  4. Step 4: Simplify right side
    18,470.81x = 257,122,783.79
  5. Step 5: Solve for x
    x = 257,122,783.79/18,470.81
  6. Step 6: Final answer
    x = 13,920.49

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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.