Home / 39,996.72-55,222.56-30,905.28

Finding the Fourth Proportional to 39,996.72, 55,222.56 and 30,905.28

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Solution

The fourth proportional to 39,996.72, 55,222.56 and 30,905.28 is: 42,670.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,996.72 : 55,222.56 = 30,905.28 : x
  2. Step 2: Convert to fraction form
    39,996.72/55,222.56 = 30,905.28/x
  3. Step 3: Cross multiply
    39,996.72x = 55,222.56 × 30,905.28
  4. Step 4: Simplify right side
    39,996.72x = 1,706,668,679.12
  5. Step 5: Solve for x
    x = 1,706,668,679.12/39,996.72
  6. Step 6: Final answer
    x = 42,670.22

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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.