Home / 30,576.12-42,179.52-19,971.96

Finding the Fourth Proportional to 30,576.12, 42,179.52 and 19,971.96

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Solution

The fourth proportional to 30,576.12, 42,179.52 and 19,971.96 is: 27,551.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,576.12 : 42,179.52 = 19,971.96 : x
  2. Step 2: Convert to fraction form
    30,576.12/42,179.52 = 19,971.96/x
  3. Step 3: Cross multiply
    30,576.12x = 42,179.52 × 19,971.96
  4. Step 4: Simplify right side
    30,576.12x = 842,407,686.26
  5. Step 5: Solve for x
    x = 842,407,686.26/30,576.12
  6. Step 6: Final answer
    x = 27,551.16

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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.