Home / 30,710.16-42,334.92-21,729.96

Finding the Fourth Proportional to 30,710.16, 42,334.92 and 21,729.96

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Solution

The fourth proportional to 30,710.16, 42,334.92 and 21,729.96 is: 29,955.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,710.16 : 42,334.92 = 21,729.96 : x
  2. Step 2: Convert to fraction form
    30,710.16/42,334.92 = 21,729.96/x
  3. Step 3: Cross multiply
    30,710.16x = 42,334.92 × 21,729.96
  4. Step 4: Simplify right side
    30,710.16x = 919,936,118.20
  5. Step 5: Solve for x
    x = 919,936,118.20/30,710.16
  6. Step 6: Final answer
    x = 29,955.43

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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.