Home / 11,199.12-15,449.28-6,720.72

Finding the Fourth Proportional to 11,199.12, 15,449.28 and 6,720.72

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Solution

The fourth proportional to 11,199.12, 15,449.28 and 6,720.72 is: 9,271.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,199.12 : 15,449.28 = 6,720.72 : x
  2. Step 2: Convert to fraction form
    11,199.12/15,449.28 = 6,720.72/x
  3. Step 3: Cross multiply
    11,199.12x = 15,449.28 × 6,720.72
  4. Step 4: Simplify right side
    11,199.12x = 103,830,285.08
  5. Step 5: Solve for x
    x = 103,830,285.08/11,199.12
  6. Step 6: Final answer
    x = 9,271.29

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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.