Home / 30,879.27-42,602.49-18,938.25

Finding the Fourth Proportional to 30,879.27, 42,602.49 and 18,938.25

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Solution

The fourth proportional to 30,879.27, 42,602.49 and 18,938.25 is: 26,128.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,879.27 : 42,602.49 = 18,938.25 : x
  2. Step 2: Convert to fraction form
    30,879.27/42,602.49 = 18,938.25/x
  3. Step 3: Cross multiply
    30,879.27x = 42,602.49 × 18,938.25
  4. Step 4: Simplify right side
    30,879.27x = 806,816,606.24
  5. Step 5: Solve for x
    x = 806,816,606.24/30,879.27
  6. Step 6: Final answer
    x = 26,128.10

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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.