Home / 8,420.84-11,620.88-4,885.12

Finding the Fourth Proportional to 8,420.84, 11,620.88 and 4,885.12

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Solution

The fourth proportional to 8,420.84, 11,620.88 and 4,885.12 is: 6,741.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.84 : 11,620.88 = 4,885.12 : x
  2. Step 2: Convert to fraction form
    8,420.84/11,620.88 = 4,885.12/x
  3. Step 3: Cross multiply
    8,420.84x = 11,620.88 × 4,885.12
  4. Step 4: Simplify right side
    8,420.84x = 56,769,393.31
  5. Step 5: Solve for x
    x = 56,769,393.31/8,420.84
  6. Step 6: Final answer
    x = 6,741.54

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Double scale
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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.