Home / 11,871.20-16,364.76-8,721.92

Finding the Fourth Proportional to 11,871.20, 16,364.76 and 8,721.92

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Solution

The fourth proportional to 11,871.20, 16,364.76 and 8,721.92 is: 12,023.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,871.20 : 16,364.76 = 8,721.92 : x
  2. Step 2: Convert to fraction form
    11,871.20/16,364.76 = 8,721.92/x
  3. Step 3: Cross multiply
    11,871.20x = 16,364.76 × 8,721.92
  4. Step 4: Simplify right side
    11,871.20x = 142,732,127.54
  5. Step 5: Solve for x
    x = 142,732,127.54/11,871.20
  6. Step 6: Final answer
    x = 12,023.40

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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.