Home / 15,517.56-21,407.81-10,138.15

Finding the Fourth Proportional to 15,517.56, 21,407.81 and 10,138.15

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Solution

The fourth proportional to 15,517.56, 21,407.81 and 10,138.15 is: 13,986.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,517.56 : 21,407.81 = 10,138.15 : x
  2. Step 2: Convert to fraction form
    15,517.56/21,407.81 = 10,138.15/x
  3. Step 3: Cross multiply
    15,517.56x = 21,407.81 × 10,138.15
  4. Step 4: Simplify right side
    15,517.56x = 217,035,588.95
  5. Step 5: Solve for x
    x = 217,035,588.95/15,517.56
  6. Step 6: Final answer
    x = 13,986.45

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