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Finding the Fourth Proportional to 12,655.54, 18,987.15 and 8,964.91

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Solution

The fourth proportional to 12,655.54, 18,987.15 and 8,964.91 is: 13,450.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,655.54 : 18,987.15 = 8,964.91 : x
  2. Step 2: Convert to fraction form
    12,655.54/18,987.15 = 8,964.91/x
  3. Step 3: Cross multiply
    12,655.54x = 18,987.15 × 8,964.91
  4. Step 4: Simplify right side
    12,655.54x = 170,218,090.91
  5. Step 5: Solve for x
    x = 170,218,090.91/12,655.54
  6. Step 6: Final answer
    x = 13,450.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.