Home / 8,420.99-11,623.52-4,885.07

Finding the Fourth Proportional to 8,420.99, 11,623.52 and 4,885.07

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Solution

The fourth proportional to 8,420.99, 11,623.52 and 4,885.07 is: 6,742.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.99 : 11,623.52 = 4,885.07 : x
  2. Step 2: Convert to fraction form
    8,420.99/11,623.52 = 4,885.07/x
  3. Step 3: Cross multiply
    8,420.99x = 11,623.52 × 4,885.07
  4. Step 4: Simplify right side
    8,420.99x = 56,781,708.85
  5. Step 5: Solve for x
    x = 56,781,708.85/8,420.99
  6. Step 6: Final answer
    x = 6,742.88

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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.