Home / 30,725.28-42,381.18-21,292.02

Finding the Fourth Proportional to 30,725.28, 42,381.18 and 21,292.02

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Solution

The fourth proportional to 30,725.28, 42,381.18 and 21,292.02 is: 29,369.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,725.28 : 42,381.18 = 21,292.02 : x
  2. Step 2: Convert to fraction form
    30,725.28/42,381.18 = 21,292.02/x
  3. Step 3: Cross multiply
    30,725.28x = 42,381.18 × 21,292.02
  4. Step 4: Simplify right side
    30,725.28x = 902,380,932.18
  5. Step 5: Solve for x
    x = 902,380,932.18/30,725.28
  6. Step 6: Final answer
    x = 29,369.33

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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.