Home / 7,420.79-11,129.36-2,490.32

Finding the Fourth Proportional to 7,420.79, 11,129.36 and 2,490.32

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Solution

The fourth proportional to 7,420.79, 11,129.36 and 2,490.32 is: 3,734.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,420.79 : 11,129.36 = 2,490.32 : x
  2. Step 2: Convert to fraction form
    7,420.79/11,129.36 = 2,490.32/x
  3. Step 3: Cross multiply
    7,420.79x = 11,129.36 × 2,490.32
  4. Step 4: Simplify right side
    7,420.79x = 27,715,667.80
  5. Step 5: Solve for x
    x = 27,715,667.80/7,420.79
  6. Step 6: Final answer
    x = 3,734.87

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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.