Home / 30,736.90-42,306.81-21,768.89

Finding the Fourth Proportional to 30,736.90, 42,306.81 and 21,768.89

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Solution

The fourth proportional to 30,736.90, 42,306.81 and 21,768.89 is: 29,963.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,736.90 : 42,306.81 = 21,768.89 : x
  2. Step 2: Convert to fraction form
    30,736.90/42,306.81 = 21,768.89/x
  3. Step 3: Cross multiply
    30,736.90x = 42,306.81 × 21,768.89
  4. Step 4: Simplify right side
    30,736.90x = 920,971,999.97
  5. Step 5: Solve for x
    x = 920,971,999.97/30,736.90
  6. Step 6: Final answer
    x = 29,963.07

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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.