Home / 8,521.20-11,759.80-5,164.32

Finding the Fourth Proportional to 8,521.20, 11,759.80 and 5,164.32

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Solution

The fourth proportional to 8,521.20, 11,759.80 and 5,164.32 is: 7,127.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,521.20 : 11,759.80 = 5,164.32 : x
  2. Step 2: Convert to fraction form
    8,521.20/11,759.80 = 5,164.32/x
  3. Step 3: Cross multiply
    8,521.20x = 11,759.80 × 5,164.32
  4. Step 4: Simplify right side
    8,521.20x = 60,731,370.34
  5. Step 5: Solve for x
    x = 60,731,370.34/8,521.20
  6. Step 6: Final answer
    x = 7,127.09

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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.