Home / 12,280.81-18,405.80-5,252.56

Finding the Fourth Proportional to 12,280.81, 18,405.80 and 5,252.56

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Solution

The fourth proportional to 12,280.81, 18,405.80 and 5,252.56 is: 7,872.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,280.81 : 18,405.80 = 5,252.56 : x
  2. Step 2: Convert to fraction form
    12,280.81/18,405.80 = 5,252.56/x
  3. Step 3: Cross multiply
    12,280.81x = 18,405.80 × 5,252.56
  4. Step 4: Simplify right side
    12,280.81x = 96,677,581.98
  5. Step 5: Solve for x
    x = 96,677,581.98/12,280.81
  6. Step 6: Final answer
    x = 7,872.25

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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.