Home / 30,918.22-42,619.80-18,959.38

Finding the Fourth Proportional to 30,918.22, 42,619.80 and 18,959.38

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Solution

The fourth proportional to 30,918.22, 42,619.80 and 18,959.38 is: 26,134.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,918.22 : 42,619.80 = 18,959.38 : x
  2. Step 2: Convert to fraction form
    30,918.22/42,619.80 = 18,959.38/x
  3. Step 3: Cross multiply
    30,918.22x = 42,619.80 × 18,959.38
  4. Step 4: Simplify right side
    30,918.22x = 808,044,983.72
  5. Step 5: Solve for x
    x = 808,044,983.72/30,918.22
  6. Step 6: Final answer
    x = 26,134.91

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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.