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Finding the Fourth Proportional to 5,672.91, 7,828.80 and 3,435.21

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Solution

The fourth proportional to 5,672.91, 7,828.80 and 3,435.21 is: 4,740.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,672.91 : 7,828.80 = 3,435.21 : x
  2. Step 2: Convert to fraction form
    5,672.91/7,828.80 = 3,435.21/x
  3. Step 3: Cross multiply
    5,672.91x = 7,828.80 × 3,435.21
  4. Step 4: Simplify right side
    5,672.91x = 26,893,572.05
  5. Step 5: Solve for x
    x = 26,893,572.05/5,672.91
  6. Step 6: Final answer
    x = 4,740.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.