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Finding the Fourth Proportional to 28,863.79, 39,831.65 and 16,117.19

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Solution

The fourth proportional to 28,863.79, 39,831.65 and 16,117.19 is: 22,241.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,863.79 : 39,831.65 = 16,117.19 : x
  2. Step 2: Convert to fraction form
    28,863.79/39,831.65 = 16,117.19/x
  3. Step 3: Cross multiply
    28,863.79x = 39,831.65 × 16,117.19
  4. Step 4: Simplify right side
    28,863.79x = 641,974,271.06
  5. Step 5: Solve for x
    x = 641,974,271.06/28,863.79
  6. Step 6: Final answer
    x = 22,241.51

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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.