Home / 8,079.12-11,147.24-5,385.02

Finding the Fourth Proportional to 8,079.12, 11,147.24 and 5,385.02

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Solution

The fourth proportional to 8,079.12, 11,147.24 and 5,385.02 is: 7,430.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,079.12 : 11,147.24 = 5,385.02 : x
  2. Step 2: Convert to fraction form
    8,079.12/11,147.24 = 5,385.02/x
  3. Step 3: Cross multiply
    8,079.12x = 11,147.24 × 5,385.02
  4. Step 4: Simplify right side
    8,079.12x = 60,028,068.07
  5. Step 5: Solve for x
    x = 60,028,068.07/8,079.12
  6. Step 6: Final answer
    x = 7,430.03

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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.