Home / 20,310.80-28,029.48-11,358.64

Finding the Fourth Proportional to 20,310.80, 28,029.48 and 11,358.64

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Solution

The fourth proportional to 20,310.80, 28,029.48 and 11,358.64 is: 15,675.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,310.80 : 28,029.48 = 11,358.64 : x
  2. Step 2: Convert to fraction form
    20,310.80/28,029.48 = 11,358.64/x
  3. Step 3: Cross multiply
    20,310.80x = 28,029.48 × 11,358.64
  4. Step 4: Simplify right side
    20,310.80x = 318,376,772.71
  5. Step 5: Solve for x
    x = 318,376,772.71/20,310.80
  6. Step 6: Final answer
    x = 15,675.25

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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.