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Finding the Fourth Proportional to 28,346.45, 42,520.07 and 9,878.45

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Solution

The fourth proportional to 28,346.45, 42,520.07 and 9,878.45 is: 14,817.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,346.45 : 42,520.07 = 9,878.45 : x
  2. Step 2: Convert to fraction form
    28,346.45/42,520.07 = 9,878.45/x
  3. Step 3: Cross multiply
    28,346.45x = 42,520.07 × 9,878.45
  4. Step 4: Simplify right side
    28,346.45x = 420,032,123.50
  5. Step 5: Solve for x
    x = 420,032,123.50/28,346.45
  6. Step 6: Final answer
    x = 14,817.81

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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.