Home / 21,822.40-30,117.36-12,392.56

Finding the Fourth Proportional to 21,822.40, 30,117.36 and 12,392.56

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Solution

The fourth proportional to 21,822.40, 30,117.36 and 12,392.56 is: 17,103.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,822.40 : 30,117.36 = 12,392.56 : x
  2. Step 2: Convert to fraction form
    21,822.40/30,117.36 = 12,392.56/x
  3. Step 3: Cross multiply
    21,822.40x = 30,117.36 × 12,392.56
  4. Step 4: Simplify right side
    21,822.40x = 373,231,190.84
  5. Step 5: Solve for x
    x = 373,231,190.84/21,822.40
  6. Step 6: Final answer
    x = 17,103.12

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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.