Home / 21,947.90-30,288.44-12,388.28

Finding the Fourth Proportional to 21,947.90, 30,288.44 and 12,388.28

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Solution

The fourth proportional to 21,947.90, 30,288.44 and 12,388.28 is: 17,096.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,947.90 : 30,288.44 = 12,388.28 : x
  2. Step 2: Convert to fraction form
    21,947.90/30,288.44 = 12,388.28/x
  3. Step 3: Cross multiply
    21,947.90x = 30,288.44 × 12,388.28
  4. Step 4: Simplify right side
    21,947.90x = 375,221,555.01
  5. Step 5: Solve for x
    x = 375,221,555.01/21,947.90
  6. Step 6: Final answer
    x = 17,096.02

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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.