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Finding the Fourth Proportional to 5,640.08, 7,783.32 and 3,156.08

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Solution

The fourth proportional to 5,640.08, 7,783.32 and 3,156.08 is: 4,355.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,640.08 : 7,783.32 = 3,156.08 : x
  2. Step 2: Convert to fraction form
    5,640.08/7,783.32 = 3,156.08/x
  3. Step 3: Cross multiply
    5,640.08x = 7,783.32 × 3,156.08
  4. Step 4: Simplify right side
    5,640.08x = 24,564,780.59
  5. Step 5: Solve for x
    x = 24,564,780.59/5,640.08
  6. Step 6: Final answer
    x = 4,355.40

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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.