Home / 3,720.08-5,130.30-2,878.09

Finding the Fourth Proportional to 3,720.08, 5,130.30 and 2,878.09

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Solution

The fourth proportional to 3,720.08, 5,130.30 and 2,878.09 is: 3,969.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.08 : 5,130.30 = 2,878.09 : x
  2. Step 2: Convert to fraction form
    3,720.08/5,130.30 = 2,878.09/x
  3. Step 3: Cross multiply
    3,720.08x = 5,130.30 × 2,878.09
  4. Step 4: Simplify right side
    3,720.08x = 14,765,465.13
  5. Step 5: Solve for x
    x = 14,765,465.13/3,720.08
  6. Step 6: Final answer
    x = 3,969.13

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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.