Home / 3,720.69-5,136.39-2,547.90

Finding the Fourth Proportional to 3,720.69, 5,136.39 and 2,547.90

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Solution

The fourth proportional to 3,720.69, 5,136.39 and 2,547.90 is: 3,517.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.69 : 5,136.39 = 2,547.90 : x
  2. Step 2: Convert to fraction form
    3,720.69/5,136.39 = 2,547.90/x
  3. Step 3: Cross multiply
    3,720.69x = 5,136.39 × 2,547.90
  4. Step 4: Simplify right side
    3,720.69x = 13,087,008.08
  5. Step 5: Solve for x
    x = 13,087,008.08/3,720.69
  6. Step 6: Final answer
    x = 3,517.36

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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.