Home / 3,987.99-5,503.55-2,309.40

Finding the Fourth Proportional to 3,987.99, 5,503.55 and 2,309.40

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Solution

The fourth proportional to 3,987.99, 5,503.55 and 2,309.40 is: 3,187.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.99 : 5,503.55 = 2,309.40 : x
  2. Step 2: Convert to fraction form
    3,987.99/5,503.55 = 2,309.40/x
  3. Step 3: Cross multiply
    3,987.99x = 5,503.55 × 2,309.40
  4. Step 4: Simplify right side
    3,987.99x = 12,709,886.82
  5. Step 5: Solve for x
    x = 12,709,886.82/3,987.99
  6. Step 6: Final answer
    x = 3,187.04

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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.