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Finding the Fourth Proportional to 28,695, 39,601.12 and 16,119.76

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Solution

The fourth proportional to 28,695, 39,601.12 and 16,119.76 is: 22,246.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,695 : 39,601.12 = 16,119.76 : x
  2. Step 2: Convert to fraction form
    28,695/39,601.12 = 16,119.76/x
  3. Step 3: Cross multiply
    28,695x = 39,601.12 × 16,119.76
  4. Step 4: Simplify right side
    28,695x = 638,360,550.13
  5. Step 5: Solve for x
    x = 638,360,550.13/28,695
  6. Step 6: Final answer
    x = 22,246.40

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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.