Home / 3,720.94-5,130.75-2,392.81

Finding the Fourth Proportional to 3,720.94, 5,130.75 and 2,392.81

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Solution

The fourth proportional to 3,720.94, 5,130.75 and 2,392.81 is: 3,299.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.94 : 5,130.75 = 2,392.81 : x
  2. Step 2: Convert to fraction form
    3,720.94/5,130.75 = 2,392.81/x
  3. Step 3: Cross multiply
    3,720.94x = 5,130.75 × 2,392.81
  4. Step 4: Simplify right side
    3,720.94x = 12,276,909.91
  5. Step 5: Solve for x
    x = 12,276,909.91/3,720.94
  6. Step 6: Final answer
    x = 3,299.41

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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.