Home / 28,212.38-42,318.72-8,490.80

Finding the Fourth Proportional to 28,212.38, 42,318.72 and 8,490.80

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Solution

The fourth proportional to 28,212.38, 42,318.72 and 8,490.80 is: 12,736.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,212.38 : 42,318.72 = 8,490.80 : x
  2. Step 2: Convert to fraction form
    28,212.38/42,318.72 = 8,490.80/x
  3. Step 3: Cross multiply
    28,212.38x = 42,318.72 × 8,490.80
  4. Step 4: Simplify right side
    28,212.38x = 359,319,787.78
  5. Step 5: Solve for x
    x = 359,319,787.78/28,212.38
  6. Step 6: Final answer
    x = 12,736.25

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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.