Home / 9,987.20-13,782.38-5,511

Finding the Fourth Proportional to 9,987.20, 13,782.38 and 5,511

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Solution

The fourth proportional to 9,987.20, 13,782.38 and 5,511 is: 7,605.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,987.20 : 13,782.38 = 5,511 : x
  2. Step 2: Convert to fraction form
    9,987.20/13,782.38 = 5,511/x
  3. Step 3: Cross multiply
    9,987.20x = 13,782.38 × 5,511
  4. Step 4: Simplify right side
    9,987.20x = 75,954,668.63
  5. Step 5: Solve for x
    x = 75,954,668.63/9,987.20
  6. Step 6: Final answer
    x = 7,605.21

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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.