Home / 28,890.40-39,840.32-17,561.44

Finding the Fourth Proportional to 28,890.40, 39,840.32 and 17,561.44

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Solution

The fourth proportional to 28,890.40, 39,840.32 and 17,561.44 is: 24,217.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,890.40 : 39,840.32 = 17,561.44 : x
  2. Step 2: Convert to fraction form
    28,890.40/39,840.32 = 17,561.44/x
  3. Step 3: Cross multiply
    28,890.40x = 39,840.32 × 17,561.44
  4. Step 4: Simplify right side
    28,890.40x = 699,653,389.26
  5. Step 5: Solve for x
    x = 699,653,389.26/28,890.40
  6. Step 6: Final answer
    x = 24,217.50

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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.