Home / 11,140.24-16,720.80-7,445.20

Finding the Fourth Proportional to 11,140.24, 16,720.80 and 7,445.20

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Solution

The fourth proportional to 11,140.24, 16,720.80 and 7,445.20 is: 11,174.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,140.24 : 16,720.80 = 7,445.20 : x
  2. Step 2: Convert to fraction form
    11,140.24/16,720.80 = 7,445.20/x
  3. Step 3: Cross multiply
    11,140.24x = 16,720.80 × 7,445.20
  4. Step 4: Simplify right side
    11,140.24x = 124,489,700.16
  5. Step 5: Solve for x
    x = 124,489,700.16/11,140.24
  6. Step 6: Final answer
    x = 11,174.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.