Home / 31,108.80-42,917.88-19,151.36

Finding the Fourth Proportional to 31,108.80, 42,917.88 and 19,151.36

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Solution

The fourth proportional to 31,108.80, 42,917.88 and 19,151.36 is: 26,421.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,108.80 : 42,917.88 = 19,151.36 : x
  2. Step 2: Convert to fraction form
    31,108.80/42,917.88 = 19,151.36/x
  3. Step 3: Cross multiply
    31,108.80x = 42,917.88 × 19,151.36
  4. Step 4: Simplify right side
    31,108.80x = 821,935,770.32
  5. Step 5: Solve for x
    x = 821,935,770.32/31,108.80
  6. Step 6: Final answer
    x = 26,421.33

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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.