Home / 30,999.44-42,771.75-19,664.81

Finding the Fourth Proportional to 30,999.44, 42,771.75 and 19,664.81

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Solution

The fourth proportional to 30,999.44, 42,771.75 and 19,664.81 is: 27,132.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,999.44 : 42,771.75 = 19,664.81 : x
  2. Step 2: Convert to fraction form
    30,999.44/42,771.75 = 19,664.81/x
  3. Step 3: Cross multiply
    30,999.44x = 42,771.75 × 19,664.81
  4. Step 4: Simplify right side
    30,999.44x = 841,098,209.91
  5. Step 5: Solve for x
    x = 841,098,209.91/30,999.44
  6. Step 6: Final answer
    x = 27,132.69

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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.