Home / 28,781.96-39,703.90-19,813.95

Finding the Fourth Proportional to 28,781.96, 39,703.90 and 19,813.95

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Solution

The fourth proportional to 28,781.96, 39,703.90 and 19,813.95 is: 27,332.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,781.96 : 39,703.90 = 19,813.95 : x
  2. Step 2: Convert to fraction form
    28,781.96/39,703.90 = 19,813.95/x
  3. Step 3: Cross multiply
    28,781.96x = 39,703.90 × 19,813.95
  4. Step 4: Simplify right side
    28,781.96x = 786,691,089.41
  5. Step 5: Solve for x
    x = 786,691,089.41/28,781.96
  6. Step 6: Final answer
    x = 27,332.78

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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.