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Finding the Fourth Proportional to 25,982.40, 38,988.99 and 10,988.68

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Solution

The fourth proportional to 25,982.40, 38,988.99 and 10,988.68 is: 16,489.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,982.40 : 38,988.99 = 10,988.68 : x
  2. Step 2: Convert to fraction form
    25,982.40/38,988.99 = 10,988.68/x
  3. Step 3: Cross multiply
    25,982.40x = 38,988.99 × 10,988.68
  4. Step 4: Simplify right side
    25,982.40x = 428,437,479.36
  5. Step 5: Solve for x
    x = 428,437,479.36/25,982.40
  6. Step 6: Final answer
    x = 16,489.52

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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.