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Finding the Fourth Proportional to 28,375.85, 39,157.16 and 16,275.71

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Solution

The fourth proportional to 28,375.85, 39,157.16 and 16,275.71 is: 22,459.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,375.85 : 39,157.16 = 16,275.71 : x
  2. Step 2: Convert to fraction form
    28,375.85/39,157.16 = 16,275.71/x
  3. Step 3: Cross multiply
    28,375.85x = 39,157.16 × 16,275.71
  4. Step 4: Simplify right side
    28,375.85x = 637,310,303.42
  5. Step 5: Solve for x
    x = 637,310,303.42/28,375.85
  6. Step 6: Final answer
    x = 22,459.61

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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.