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Finding the Fourth Proportional to 28,420.64, 42,634.85 and 9,695.65

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Solution

The fourth proportional to 28,420.64, 42,634.85 and 9,695.65 is: 14,544.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,420.64 : 42,634.85 = 9,695.65 : x
  2. Step 2: Convert to fraction form
    28,420.64/42,634.85 = 9,695.65/x
  3. Step 3: Cross multiply
    28,420.64x = 42,634.85 × 9,695.65
  4. Step 4: Simplify right side
    28,420.64x = 413,372,620.40
  5. Step 5: Solve for x
    x = 413,372,620.40/28,420.64
  6. Step 6: Final answer
    x = 14,544.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.