Home / 28,813.69-39,778.58-19,909.13

Finding the Fourth Proportional to 28,813.69, 39,778.58 and 19,909.13

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Solution

The fourth proportional to 28,813.69, 39,778.58 and 19,909.13 is: 27,485.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,813.69 : 39,778.58 = 19,909.13 : x
  2. Step 2: Convert to fraction form
    28,813.69/39,778.58 = 19,909.13/x
  3. Step 3: Cross multiply
    28,813.69x = 39,778.58 × 19,909.13
  4. Step 4: Simplify right side
    28,813.69x = 791,956,820.89
  5. Step 5: Solve for x
    x = 791,956,820.89/28,813.69
  6. Step 6: Final answer
    x = 27,485.44

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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.