Home / 21,930.03-30,261.21-12,975.78

Finding the Fourth Proportional to 21,930.03, 30,261.21 and 12,975.78

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Solution

The fourth proportional to 21,930.03, 30,261.21 and 12,975.78 is: 17,905.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,930.03 : 30,261.21 = 12,975.78 : x
  2. Step 2: Convert to fraction form
    21,930.03/30,261.21 = 12,975.78/x
  3. Step 3: Cross multiply
    21,930.03x = 30,261.21 × 12,975.78
  4. Step 4: Simplify right side
    21,930.03x = 392,662,803.49
  5. Step 5: Solve for x
    x = 392,662,803.49/21,930.03
  6. Step 6: Final answer
    x = 17,905.26

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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.