Home / 30,998.13-42,782.09-18,905.63

Finding the Fourth Proportional to 30,998.13, 42,782.09 and 18,905.63

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Solution

The fourth proportional to 30,998.13, 42,782.09 and 18,905.63 is: 26,092.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,998.13 : 42,782.09 = 18,905.63 : x
  2. Step 2: Convert to fraction form
    30,998.13/42,782.09 = 18,905.63/x
  3. Step 3: Cross multiply
    30,998.13x = 42,782.09 × 18,905.63
  4. Step 4: Simplify right side
    30,998.13x = 808,822,055.73
  5. Step 5: Solve for x
    x = 808,822,055.73/30,998.13
  6. Step 6: Final answer
    x = 26,092.61

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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.