Home / 12,215.61-16,855.49-6,909.30

Finding the Fourth Proportional to 12,215.61, 16,855.49 and 6,909.30

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Solution

The fourth proportional to 12,215.61, 16,855.49 and 6,909.30 is: 9,533.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,215.61 : 16,855.49 = 6,909.30 : x
  2. Step 2: Convert to fraction form
    12,215.61/16,855.49 = 6,909.30/x
  3. Step 3: Cross multiply
    12,215.61x = 16,855.49 × 6,909.30
  4. Step 4: Simplify right side
    12,215.61x = 116,459,654.33
  5. Step 5: Solve for x
    x = 116,459,654.33/12,215.61
  6. Step 6: Final answer
    x = 9,533.67

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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.