Home / 28,107.48-42,153.84-8,380.80

Finding the Fourth Proportional to 28,107.48, 42,153.84 and 8,380.80

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Solution

The fourth proportional to 28,107.48, 42,153.84 and 8,380.80 is: 12,569.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,107.48 : 42,153.84 = 8,380.80 : x
  2. Step 2: Convert to fraction form
    28,107.48/42,153.84 = 8,380.80/x
  3. Step 3: Cross multiply
    28,107.48x = 42,153.84 × 8,380.80
  4. Step 4: Simplify right side
    28,107.48x = 353,282,902.27
  5. Step 5: Solve for x
    x = 353,282,902.27/28,107.48
  6. Step 6: Final answer
    x = 12,569.00

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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.