Home / 30,945.65-42,700.78-18,191.26

Finding the Fourth Proportional to 30,945.65, 42,700.78 and 18,191.26

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Solution

The fourth proportional to 30,945.65, 42,700.78 and 18,191.26 is: 25,101.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,945.65 : 42,700.78 = 18,191.26 : x
  2. Step 2: Convert to fraction form
    30,945.65/42,700.78 = 18,191.26/x
  3. Step 3: Cross multiply
    30,945.65x = 42,700.78 × 18,191.26
  4. Step 4: Simplify right side
    30,945.65x = 776,781,067.30
  5. Step 5: Solve for x
    x = 776,781,067.30/30,945.65
  6. Step 6: Final answer
    x = 25,101.47

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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.