Home / 21,812.46-30,102.75-12,381.63

Finding the Fourth Proportional to 21,812.46, 30,102.75 and 12,381.63

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Solution

The fourth proportional to 21,812.46, 30,102.75 and 12,381.63 is: 17,087.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,812.46 : 30,102.75 = 12,381.63 : x
  2. Step 2: Convert to fraction form
    21,812.46/30,102.75 = 12,381.63/x
  3. Step 3: Cross multiply
    21,812.46x = 30,102.75 × 12,381.63
  4. Step 4: Simplify right side
    21,812.46x = 372,721,112.48
  5. Step 5: Solve for x
    x = 372,721,112.48/21,812.46
  6. Step 6: Final answer
    x = 17,087.53

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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.