Home / 20,766.16-28,658.96-11,816.40

Finding the Fourth Proportional to 20,766.16, 28,658.96 and 11,816.40

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Solution

The fourth proportional to 20,766.16, 28,658.96 and 11,816.40 is: 16,307.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,766.16 : 28,658.96 = 11,816.40 : x
  2. Step 2: Convert to fraction form
    20,766.16/28,658.96 = 11,816.40/x
  3. Step 3: Cross multiply
    20,766.16x = 28,658.96 × 11,816.40
  4. Step 4: Simplify right side
    20,766.16x = 338,645,734.94
  5. Step 5: Solve for x
    x = 338,645,734.94/20,766.16
  6. Step 6: Final answer
    x = 16,307.58

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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.