Home / 20,812.16-28,716.52-12,310.08

Finding the Fourth Proportional to 20,812.16, 28,716.52 and 12,310.08

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Solution

The fourth proportional to 20,812.16, 28,716.52 and 12,310.08 is: 16,985.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.16 : 28,716.52 = 12,310.08 : x
  2. Step 2: Convert to fraction form
    20,812.16/28,716.52 = 12,310.08/x
  3. Step 3: Cross multiply
    20,812.16x = 28,716.52 × 12,310.08
  4. Step 4: Simplify right side
    20,812.16x = 353,502,658.52
  5. Step 5: Solve for x
    x = 353,502,658.52/20,812.16
  6. Step 6: Final answer
    x = 16,985.39

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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.