Home / 30,974.51-42,721.04-20,886.97

Finding the Fourth Proportional to 30,974.51, 42,721.04 and 20,886.97

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Solution

The fourth proportional to 30,974.51, 42,721.04 and 20,886.97 is: 28,807.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,974.51 : 42,721.04 = 20,886.97 : x
  2. Step 2: Convert to fraction form
    30,974.51/42,721.04 = 20,886.97/x
  3. Step 3: Cross multiply
    30,974.51x = 42,721.04 × 20,886.97
  4. Step 4: Simplify right side
    30,974.51x = 892,312,976.41
  5. Step 5: Solve for x
    x = 892,312,976.41/30,974.51
  6. Step 6: Final answer
    x = 28,807.98

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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.