Home / 31,128.44-42,957.14-16,981.18

Finding the Fourth Proportional to 31,128.44, 42,957.14 and 16,981.18

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Solution

The fourth proportional to 31,128.44, 42,957.14 and 16,981.18 is: 23,433.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,128.44 : 42,957.14 = 16,981.18 : x
  2. Step 2: Convert to fraction form
    31,128.44/42,957.14 = 16,981.18/x
  3. Step 3: Cross multiply
    31,128.44x = 42,957.14 × 16,981.18
  4. Step 4: Simplify right side
    31,128.44x = 729,462,734.33
  5. Step 5: Solve for x
    x = 729,462,734.33/31,128.44
  6. Step 6: Final answer
    x = 23,433.97

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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.