Home / 2,487.10-3,430.20-2,187.70

Finding the Fourth Proportional to 2,487.10, 3,430.20 and 2,187.70

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Solution

The fourth proportional to 2,487.10, 3,430.20 and 2,187.70 is: 3,017.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,487.10 : 3,430.20 = 2,187.70 : x
  2. Step 2: Convert to fraction form
    2,487.10/3,430.20 = 2,187.70/x
  3. Step 3: Cross multiply
    2,487.10x = 3,430.20 × 2,187.70
  4. Step 4: Simplify right side
    2,487.10x = 7,504,248.54
  5. Step 5: Solve for x
    x = 7,504,248.54/2,487.10
  6. Step 6: Final answer
    x = 3,017.27

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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.