Home / 20,930.41-28,871.16-12,426.76

Finding the Fourth Proportional to 20,930.41, 28,871.16 and 12,426.76

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Solution

The fourth proportional to 20,930.41, 28,871.16 and 12,426.76 is: 17,141.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.41 : 28,871.16 = 12,426.76 : x
  2. Step 2: Convert to fraction form
    20,930.41/28,871.16 = 12,426.76/x
  3. Step 3: Cross multiply
    20,930.41x = 28,871.16 × 12,426.76
  4. Step 4: Simplify right side
    20,930.41x = 358,774,976.24
  5. Step 5: Solve for x
    x = 358,774,976.24/20,930.41
  6. Step 6: Final answer
    x = 17,141.33

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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.