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Finding the Fourth Proportional to 28,921, 39,918.28 and 16,353.04

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Solution

The fourth proportional to 28,921, 39,918.28 and 16,353.04 is: 22,571.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,921 : 39,918.28 = 16,353.04 : x
  2. Step 2: Convert to fraction form
    28,921/39,918.28 = 16,353.04/x
  3. Step 3: Cross multiply
    28,921x = 39,918.28 × 16,353.04
  4. Step 4: Simplify right side
    28,921x = 652,785,229.57
  5. Step 5: Solve for x
    x = 652,785,229.57/28,921
  6. Step 6: Final answer
    x = 22,571.32

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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.