Home / 21,921.98-30,248.44-12,969.86

Finding the Fourth Proportional to 21,921.98, 30,248.44 and 12,969.86

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Solution

The fourth proportional to 21,921.98, 30,248.44 and 12,969.86 is: 17,896.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,921.98 : 30,248.44 = 12,969.86 : x
  2. Step 2: Convert to fraction form
    21,921.98/30,248.44 = 12,969.86/x
  3. Step 3: Cross multiply
    21,921.98x = 30,248.44 × 12,969.86
  4. Step 4: Simplify right side
    21,921.98x = 392,317,848.35
  5. Step 5: Solve for x
    x = 392,317,848.35/21,921.98
  6. Step 6: Final answer
    x = 17,896.10

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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.