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Finding the Fourth Proportional to 28,369.76, 42,554.64 and 28,328.76

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Solution

The fourth proportional to 28,369.76, 42,554.64 and 28,328.76 is: 42,493.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,369.76 : 42,554.64 = 28,328.76 : x
  2. Step 2: Convert to fraction form
    28,369.76/42,554.64 = 28,328.76/x
  3. Step 3: Cross multiply
    28,369.76x = 42,554.64 × 28,328.76
  4. Step 4: Simplify right side
    28,369.76x = 1,205,520,183.45
  5. Step 5: Solve for x
    x = 1,205,520,183.45/28,369.76
  6. Step 6: Final answer
    x = 42,493.15

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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.