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Finding the Fourth Proportional to 28,865.80, 39,830.53 and 17,529.40

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Solution

The fourth proportional to 28,865.80, 39,830.53 and 17,529.40 is: 24,187.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,865.80 : 39,830.53 = 17,529.40 : x
  2. Step 2: Convert to fraction form
    28,865.80/39,830.53 = 17,529.40/x
  3. Step 3: Cross multiply
    28,865.80x = 39,830.53 × 17,529.40
  4. Step 4: Simplify right side
    28,865.80x = 698,205,149.18
  5. Step 5: Solve for x
    x = 698,205,149.18/28,865.80
  6. Step 6: Final answer
    x = 24,187.97

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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.