Home / 21,921.04-30,249.40-12,487.76

Finding the Fourth Proportional to 21,921.04, 30,249.40 and 12,487.76

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Solution

The fourth proportional to 21,921.04, 30,249.40 and 12,487.76 is: 17,232.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,921.04 : 30,249.40 = 12,487.76 : x
  2. Step 2: Convert to fraction form
    21,921.04/30,249.40 = 12,487.76/x
  3. Step 3: Cross multiply
    21,921.04x = 30,249.40 × 12,487.76
  4. Step 4: Simplify right side
    21,921.04x = 377,747,247.34
  5. Step 5: Solve for x
    x = 377,747,247.34/21,921.04
  6. Step 6: Final answer
    x = 17,232.18

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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.