Home / 12,121.04-16,729.88-7,155.92

Finding the Fourth Proportional to 12,121.04, 16,729.88 and 7,155.92

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Solution

The fourth proportional to 12,121.04, 16,729.88 and 7,155.92 is: 9,876.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.04 : 16,729.88 = 7,155.92 : x
  2. Step 2: Convert to fraction form
    12,121.04/16,729.88 = 7,155.92/x
  3. Step 3: Cross multiply
    12,121.04x = 16,729.88 × 7,155.92
  4. Step 4: Simplify right side
    12,121.04x = 119,717,682.89
  5. Step 5: Solve for x
    x = 119,717,682.89/12,121.04
  6. Step 6: Final answer
    x = 9,876.85

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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.