Home / 13,318.94-18,382.38-12,728.45

Finding the Fourth Proportional to 13,318.94, 18,382.38 and 12,728.45

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Solution

The fourth proportional to 13,318.94, 18,382.38 and 12,728.45 is: 17,567.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,318.94 : 18,382.38 = 12,728.45 : x
  2. Step 2: Convert to fraction form
    13,318.94/18,382.38 = 12,728.45/x
  3. Step 3: Cross multiply
    13,318.94x = 18,382.38 × 12,728.45
  4. Step 4: Simplify right side
    13,318.94x = 233,979,204.71
  5. Step 5: Solve for x
    x = 233,979,204.71/13,318.94
  6. Step 6: Final answer
    x = 17,567.40

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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.