Home / 21,996.63-30,355.49-12,928.14

Finding the Fourth Proportional to 21,996.63, 30,355.49 and 12,928.14

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Solution

The fourth proportional to 21,996.63, 30,355.49 and 12,928.14 is: 17,840.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,996.63 : 30,355.49 = 12,928.14 : x
  2. Step 2: Convert to fraction form
    21,996.63/30,355.49 = 12,928.14/x
  3. Step 3: Cross multiply
    21,996.63x = 30,355.49 × 12,928.14
  4. Step 4: Simplify right side
    21,996.63x = 392,440,056.81
  5. Step 5: Solve for x
    x = 392,440,056.81/21,996.63
  6. Step 6: Final answer
    x = 17,840.92

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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.