Home / 31,680.84-43,712.13-21,630.21

Finding the Fourth Proportional to 31,680.84, 43,712.13 and 21,630.21

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Solution

The fourth proportional to 31,680.84, 43,712.13 and 21,630.21 is: 29,844.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,680.84 : 43,712.13 = 21,630.21 : x
  2. Step 2: Convert to fraction form
    31,680.84/43,712.13 = 21,630.21/x
  3. Step 3: Cross multiply
    31,680.84x = 43,712.13 × 21,630.21
  4. Step 4: Simplify right side
    31,680.84x = 945,502,551.45
  5. Step 5: Solve for x
    x = 945,502,551.45/31,680.84
  6. Step 6: Final answer
    x = 29,844.62

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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.