Home / 8,420.28-11,620.02-4,885.58

Finding the Fourth Proportional to 8,420.28, 11,620.02 and 4,885.58

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Solution

The fourth proportional to 8,420.28, 11,620.02 and 4,885.58 is: 6,742.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.28 : 11,620.02 = 4,885.58 : x
  2. Step 2: Convert to fraction form
    8,420.28/11,620.02 = 4,885.58/x
  3. Step 3: Cross multiply
    8,420.28x = 11,620.02 × 4,885.58
  4. Step 4: Simplify right side
    8,420.28x = 56,770,537.31
  5. Step 5: Solve for x
    x = 56,770,537.31/8,420.28
  6. Step 6: Final answer
    x = 6,742.12

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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.