Home / 12,788.21-17,670.61-9,962.88

Finding the Fourth Proportional to 12,788.21, 17,670.61 and 9,962.88

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Solution

The fourth proportional to 12,788.21, 17,670.61 and 9,962.88 is: 13,766.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,788.21 : 17,670.61 = 9,962.88 : x
  2. Step 2: Convert to fraction form
    12,788.21/17,670.61 = 9,962.88/x
  3. Step 3: Cross multiply
    12,788.21x = 17,670.61 × 9,962.88
  4. Step 4: Simplify right side
    12,788.21x = 176,050,166.96
  5. Step 5: Solve for x
    x = 176,050,166.96/12,788.21
  6. Step 6: Final answer
    x = 13,766.60

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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.