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Finding the Fourth Proportional to 28,111.54, 42,153.53 and 9,385.15

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Solution

The fourth proportional to 28,111.54, 42,153.53 and 9,385.15 is: 14,073.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,111.54 : 42,153.53 = 9,385.15 : x
  2. Step 2: Convert to fraction form
    28,111.54/42,153.53 = 9,385.15/x
  3. Step 3: Cross multiply
    28,111.54x = 42,153.53 × 9,385.15
  4. Step 4: Simplify right side
    28,111.54x = 395,617,202.08
  5. Step 5: Solve for x
    x = 395,617,202.08/28,111.54
  6. Step 6: Final answer
    x = 14,073.12

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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.