Home / 20,666.12-28,518.62-12,166.28

Finding the Fourth Proportional to 20,666.12, 28,518.62 and 12,166.28

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Solution

The fourth proportional to 20,666.12, 28,518.62 and 12,166.28 is: 16,789.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.12 : 28,518.62 = 12,166.28 : x
  2. Step 2: Convert to fraction form
    20,666.12/28,518.62 = 12,166.28/x
  3. Step 3: Cross multiply
    20,666.12x = 28,518.62 × 12,166.28
  4. Step 4: Simplify right side
    20,666.12x = 346,965,419.65
  5. Step 5: Solve for x
    x = 346,965,419.65/20,666.12
  6. Step 6: Final answer
    x = 16,789.10

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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.