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Finding the Fourth Proportional to 12,888.18, 19,332.08 and 3,654.18

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Solution

The fourth proportional to 12,888.18, 19,332.08 and 3,654.18 is: 5,481.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,888.18 : 19,332.08 = 3,654.18 : x
  2. Step 2: Convert to fraction form
    12,888.18/19,332.08 = 3,654.18/x
  3. Step 3: Cross multiply
    12,888.18x = 19,332.08 × 3,654.18
  4. Step 4: Simplify right side
    12,888.18x = 70,642,900.09
  5. Step 5: Solve for x
    x = 70,642,900.09/12,888.18
  6. Step 6: Final answer
    x = 5,481.22

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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.