Home / 8,709.61-12,019.44-5,305.45

Finding the Fourth Proportional to 8,709.61, 12,019.44 and 5,305.45

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Solution

The fourth proportional to 8,709.61, 12,019.44 and 5,305.45 is: 7,321.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,709.61 : 12,019.44 = 5,305.45 : x
  2. Step 2: Convert to fraction form
    8,709.61/12,019.44 = 5,305.45/x
  3. Step 3: Cross multiply
    8,709.61x = 12,019.44 × 5,305.45
  4. Step 4: Simplify right side
    8,709.61x = 63,768,537.95
  5. Step 5: Solve for x
    x = 63,768,537.95/8,709.61
  6. Step 6: Final answer
    x = 7,321.63

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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.