Home / 12,120.84-16,728.12-6,815.52

Finding the Fourth Proportional to 12,120.84, 16,728.12 and 6,815.52

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Solution

The fourth proportional to 12,120.84, 16,728.12 and 6,815.52 is: 9,406.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.84 : 16,728.12 = 6,815.52 : x
  2. Step 2: Convert to fraction form
    12,120.84/16,728.12 = 6,815.52/x
  3. Step 3: Cross multiply
    12,120.84x = 16,728.12 × 6,815.52
  4. Step 4: Simplify right side
    12,120.84x = 114,010,836.42
  5. Step 5: Solve for x
    x = 114,010,836.42/12,120.84
  6. Step 6: Final answer
    x = 9,406.18

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Half scale
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Double scale
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Similar ratio
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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.