Home / 21,887.41-30,204.60-12,938.14

Finding the Fourth Proportional to 21,887.41, 30,204.60 and 12,938.14

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Solution

The fourth proportional to 21,887.41, 30,204.60 and 12,938.14 is: 17,854.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,887.41 : 30,204.60 = 12,938.14 : x
  2. Step 2: Convert to fraction form
    21,887.41/30,204.60 = 12,938.14/x
  3. Step 3: Cross multiply
    21,887.41x = 30,204.60 × 12,938.14
  4. Step 4: Simplify right side
    21,887.41x = 390,791,343.44
  5. Step 5: Solve for x
    x = 390,791,343.44/21,887.41
  6. Step 6: Final answer
    x = 17,854.62

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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.