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Finding the Fourth Proportional to 12,958.80, 19,405.80 and 8,552.40

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Solution

The fourth proportional to 12,958.80, 19,405.80 and 8,552.40 is: 12,807.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,958.80 : 19,405.80 = 8,552.40 : x
  2. Step 2: Convert to fraction form
    12,958.80/19,405.80 = 8,552.40/x
  3. Step 3: Cross multiply
    12,958.80x = 19,405.80 × 8,552.40
  4. Step 4: Simplify right side
    12,958.80x = 165,966,163.92
  5. Step 5: Solve for x
    x = 165,966,163.92/12,958.80
  6. Step 6: Final answer
    x = 12,807.22

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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.