Home / 28,965.18-39,962.16-18,353.28

Finding the Fourth Proportional to 28,965.18, 39,962.16 and 18,353.28

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Solution

The fourth proportional to 28,965.18, 39,962.16 and 18,353.28 is: 25,321.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,965.18 : 39,962.16 = 18,353.28 : x
  2. Step 2: Convert to fraction form
    28,965.18/39,962.16 = 18,353.28/x
  3. Step 3: Cross multiply
    28,965.18x = 39,962.16 × 18,353.28
  4. Step 4: Simplify right side
    28,965.18x = 733,436,711.88
  5. Step 5: Solve for x
    x = 733,436,711.88/28,965.18
  6. Step 6: Final answer
    x = 25,321.32

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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.