Home / 5,115.48-7,059.32-2,877.40

Finding the Fourth Proportional to 5,115.48, 7,059.32 and 2,877.40

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Solution

The fourth proportional to 5,115.48, 7,059.32 and 2,877.40 is: 3,970.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.48 : 7,059.32 = 2,877.40 : x
  2. Step 2: Convert to fraction form
    5,115.48/7,059.32 = 2,877.40/x
  3. Step 3: Cross multiply
    5,115.48x = 7,059.32 × 2,877.40
  4. Step 4: Simplify right side
    5,115.48x = 20,312,487.37
  5. Step 5: Solve for x
    x = 20,312,487.37/5,115.48
  6. Step 6: Final answer
    x = 3,970.79

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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.