Home / 30,976.51-42,723.79-20,888.97

Finding the Fourth Proportional to 30,976.51, 42,723.79 and 20,888.97

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Solution

The fourth proportional to 30,976.51, 42,723.79 and 20,888.97 is: 28,810.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,976.51 : 42,723.79 = 20,888.97 : x
  2. Step 2: Convert to fraction form
    30,976.51/42,723.79 = 20,888.97/x
  3. Step 3: Cross multiply
    30,976.51x = 42,723.79 × 20,888.97
  4. Step 4: Simplify right side
    30,976.51x = 892,455,967.60
  5. Step 5: Solve for x
    x = 892,455,967.60/30,976.51
  6. Step 6: Final answer
    x = 28,810.73

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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.