Home / 15,455.88-21,327.84-8,742.20

Finding the Fourth Proportional to 15,455.88, 21,327.84 and 8,742.20

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Solution

The fourth proportional to 15,455.88, 21,327.84 and 8,742.20 is: 12,063.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,455.88 : 21,327.84 = 8,742.20 : x
  2. Step 2: Convert to fraction form
    15,455.88/21,327.84 = 8,742.20/x
  3. Step 3: Cross multiply
    15,455.88x = 21,327.84 × 8,742.20
  4. Step 4: Simplify right side
    15,455.88x = 186,452,136.21
  5. Step 5: Solve for x
    x = 186,452,136.21/15,455.88
  6. Step 6: Final answer
    x = 12,063.51

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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.