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Finding the Fourth Proportional to 28,082.90, 42,123.44 and 8,361.63

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Solution

The fourth proportional to 28,082.90, 42,123.44 and 8,361.63 is: 12,542.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,082.90 : 42,123.44 = 8,361.63 : x
  2. Step 2: Convert to fraction form
    28,082.90/42,123.44 = 8,361.63/x
  3. Step 3: Cross multiply
    28,082.90x = 42,123.44 × 8,361.63
  4. Step 4: Simplify right side
    28,082.90x = 352,220,640.51
  5. Step 5: Solve for x
    x = 352,220,640.51/28,082.90
  6. Step 6: Final answer
    x = 12,542.17

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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.