Home / 30,434.78-42,012.92-18,501.92

Finding the Fourth Proportional to 30,434.78, 42,012.92 and 18,501.92

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Solution

The fourth proportional to 30,434.78, 42,012.92 and 18,501.92 is: 25,540.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,434.78 : 42,012.92 = 18,501.92 : x
  2. Step 2: Convert to fraction form
    30,434.78/42,012.92 = 18,501.92/x
  3. Step 3: Cross multiply
    30,434.78x = 42,012.92 × 18,501.92
  4. Step 4: Simplify right side
    30,434.78x = 777,319,836.09
  5. Step 5: Solve for x
    x = 777,319,836.09/30,434.78
  6. Step 6: Final answer
    x = 25,540.52

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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.