Home / 30,939.72-42,680.66-19,005.72

Finding the Fourth Proportional to 30,939.72, 42,680.66 and 19,005.72

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Solution

The fourth proportional to 30,939.72, 42,680.66 and 19,005.72 is: 26,217.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,939.72 : 42,680.66 = 19,005.72 : x
  2. Step 2: Convert to fraction form
    30,939.72/42,680.66 = 19,005.72/x
  3. Step 3: Cross multiply
    30,939.72x = 42,680.66 × 19,005.72
  4. Step 4: Simplify right side
    30,939.72x = 811,176,673.38
  5. Step 5: Solve for x
    x = 811,176,673.38/30,939.72
  6. Step 6: Final answer
    x = 26,217.97

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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.