Home / 10,291.77-15,395.37-8,215.83

Finding the Fourth Proportional to 10,291.77, 15,395.37 and 8,215.83

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Solution

The fourth proportional to 10,291.77, 15,395.37 and 8,215.83 is: 12,289.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,291.77 : 15,395.37 = 8,215.83 : x
  2. Step 2: Convert to fraction form
    10,291.77/15,395.37 = 8,215.83/x
  3. Step 3: Cross multiply
    10,291.77x = 15,395.37 × 8,215.83
  4. Step 4: Simplify right side
    10,291.77x = 126,485,711.90
  5. Step 5: Solve for x
    x = 126,485,711.90/10,291.77
  6. Step 6: Final answer
    x = 12,289.99

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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.