Home / 30,439.91-42,033.80-19,129

Finding the Fourth Proportional to 30,439.91, 42,033.80 and 19,129

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Solution

The fourth proportional to 30,439.91, 42,033.80 and 19,129 is: 26,414.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,439.91 : 42,033.80 = 19,129 : x
  2. Step 2: Convert to fraction form
    30,439.91/42,033.80 = 19,129/x
  3. Step 3: Cross multiply
    30,439.91x = 42,033.80 × 19,129
  4. Step 4: Simplify right side
    30,439.91x = 804,064,560.20
  5. Step 5: Solve for x
    x = 804,064,560.20/30,439.91
  6. Step 6: Final answer
    x = 26,414.81

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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.