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Finding the Fourth Proportional to 28,487.70, 42,648.50 and 16,605.12

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Solution

The fourth proportional to 28,487.70, 42,648.50 and 16,605.12 is: 24,859.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,487.70 : 42,648.50 = 16,605.12 : x
  2. Step 2: Convert to fraction form
    28,487.70/42,648.50 = 16,605.12/x
  3. Step 3: Cross multiply
    28,487.70x = 42,648.50 × 16,605.12
  4. Step 4: Simplify right side
    28,487.70x = 708,183,460.32
  5. Step 5: Solve for x
    x = 708,183,460.32/28,487.70
  6. Step 6: Final answer
    x = 24,859.27

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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.