Home / 9,108.80-12,570.20-5,129.99

Finding the Fourth Proportional to 9,108.80, 12,570.20 and 5,129.99

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Solution

The fourth proportional to 9,108.80, 12,570.20 and 5,129.99 is: 7,079.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,108.80 : 12,570.20 = 5,129.99 : x
  2. Step 2: Convert to fraction form
    9,108.80/12,570.20 = 5,129.99/x
  3. Step 3: Cross multiply
    9,108.80x = 12,570.20 × 5,129.99
  4. Step 4: Simplify right side
    9,108.80x = 64,485,000.30
  5. Step 5: Solve for x
    x = 64,485,000.30/9,108.80
  6. Step 6: Final answer
    x = 7,079.42

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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.