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Finding the Fourth Proportional to 15,938.40, 23,891.40 and 9,361.20

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Solution

The fourth proportional to 15,938.40, 23,891.40 and 9,361.20 is: 14,032.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,938.40 : 23,891.40 = 9,361.20 : x
  2. Step 2: Convert to fraction form
    15,938.40/23,891.40 = 9,361.20/x
  3. Step 3: Cross multiply
    15,938.40x = 23,891.40 × 9,361.20
  4. Step 4: Simplify right side
    15,938.40x = 223,652,173.68
  5. Step 5: Solve for x
    x = 223,652,173.68/15,938.40
  6. Step 6: Final answer
    x = 14,032.29

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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.